ISO/IEC 16449:2002

INTERNATIONAL ISO/IEC
STANDARD 16449
Second edition
2002-04-15

Information technology — 80 mm DVD —
Read-only disk
Technologies de l'information — Disque DVD de diamètre 80 mm —
Disque DVD à lecture seule




Reference number
ISO/IEC 16449:2002(E)
©
ISO/IEC 2002

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ISO/IEC 16449:2002(E)
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©  ISO/IEC 2002
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ISO/IEC 16449:2002(E)

Contents

Section 1 - General 1
1 Scope 1
2 Conformance 1
2.1 Optical Disk 1
2.2 Generating system 1
2.3 Receiving system 1
3 Normative reference 1
4 Terms and definitions 1
4.1 Adhesive layer 2
4.2 Channel bit 2
4.3 Clamping Zone 2
4.4 Digital Sum Value (DSV) 2
4.5 Disk Reference Plane 2
4.6 Dual Layer disk 2
4.7 Dummy substrate 2
4.8 Entrance surface 2
4.9 Optical disk 2
4.10 Physical sector number 2
4.11 Read-only disk 2
4.12 Recorded layer 2
4.13 Reed-Solomon code 2
4.14 Reserved field 2
4.15 Sector 2
4.16 Single Layer disk 2
4.17 Spacer 2
4.18 Substrate 2
4.19 Track 3
4.20 Track pitch 3
4.21 Zone 3
5 Conventions and notations 3
5.1 Representation of numbers 3
5.2 Names 3
6 List of acronyms 3
7 General description of the disk 4
8 General requirements 5
8.1 Environments 5
8.1.1 Test environment 5
8.1.2 Operating environment 6
8.1.3 Storage environment 6
8.1.4 Transportation 6
8.2 Safety requirements 6
8.3 Flammability 6
9 Reference measurement devices 6
9.1 Pick Up Head (PUH) 6
9.2 Measurement conditions 7
9.3 Normalized servo transfer function 8
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ISO/IEC 16449:2002(E)
9.4 Reference Servo for axial tracking 8
9.5 Reference Servo for radial tracking 9
Section 2 - Dimensional, mechanical and physical characteristics of the disk 10
10 Dimensional characteristics 10
10.1 Overall dimensions 10
10.2 First transition area 10
10.3 Second transition area 10
10.4 Clamping Zone 10
10.5 Third transition area 10
10.6 Information Zone 11
10.6.1 Sub-divisions of the Information Zone 11
10.6.2 Track geometry 12
10.6.3 Track modes 12
10.6.4 Channel bit length 12
10.7 Rim area 12
10.8 Remark on tolerances 12
10.9 Runout 13
10.9.1 Axial runout 13
10.9.2 Radial runout 13
10.10 Label 13
11 Mechanical parameters 13
11.1 Mass 13
11.2 Moment of inertia 13
11.3 Dynamic imbalance 13
11.4 Sense of rotation 13
12 Optical parameters 13
12.1 Index of refraction 13
12.2 Thickness of the transparent substrate 13
12.3 Thickness of the spacer of Types C and D 13
12.4 Angular deviation 13
12.5 Birefringence of the transparent substrate 14
12.6 Reflectivity 14
Section 3 - Operational Signals 17
13 High frequency signals (HF) 17
13.1 Modulated amplitude 17
13.2 Signal asymmetry 18
13.3 Cross-track signal 18
13.4 Quality of signals 18
13.4.1 Jitter 18
13.4.2 Random errors 18
13.4.3 Defects 18
14 Servo signals 18
14.1 Differential phase tracking error signal 19
14.2 Tangential push-pull signal 19
Section 4 - Data Format 21
15 General 21
16 Data Frames 21
16.1 Identification Data (ID) 21
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ISO/IEC 16449:2002(E)
16.2 ID Error Detection Code (IED) 22
16.3 Copyright Management Information (CPR_MAI) 23
16.4 Error Detection Code (EDC) 23
17 Scrambled Frames 23
18 ECC Blocks 24
19 Recording Frames 25
20 Modulation 26
21 Physical Sectors 27
22 Suppress control of the d.c. component 28
Section 5 - Format of the Information Zone(s) 29
23 General description of an Information Zone 29
24 Layout of the Information Zone 29
25 Physical Sector numbering 29
26 Lead-in Zone 31
26.1 Initial Zone 32
26.2 Reference Code Zone 32
26.3 Buffer Zone 1 32
26.4 Buffer Zone 2 32
26.5 Control Data Zone 32
26.5.1 Physical format information 33
26.5.2 Disk manufacturing information 34
26.5.3 Content provider information 34
27 Middle Zone 35
28 Lead-out Zone 35
Annexes
A (normative) - Measurement of the angular deviation αααα 36
B (normative) - Measurement of birefringence 38
C (normative) - Measurement of the differential phase tracking error 40
D (normative) - Measurement of light reflectance 44
E (normative) - Tapered cone for disk clamping 46
F (normative) - Measurement of jitter 47
G (normative) - 8-to-16 Modulation with RLL (2,10) requirements 50
H (normative) - Burst Cutting Area (BCA) 60
J (normative) - Source Identification Code (SID) 65
K (informative) - Measurement of the thickness of the spacer of Dual Layer disks 68
L (informative) - Note on the Reference Code 70
M (informative) - Maximum transfer rate 71
N (informative) - Disk bonding 72
P (informative) - Transportation 74


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ISO/IEC 16449:2002(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission)
form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC
participate in the development of International Standards through technical committees established by the
respective organization to deal with particular fields of technical activity. ISO and IEC technical committees
collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in
liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have
established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
The main task of the joint technical committee is to prepare International Standards. Draft International Standards
adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 16449 was prepared by ECMA (as Standard ECMA-268) and was adopted, under a special “fast-track
procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval of
national bodies of ISO and IEC.
This second edition cancels and replaces the first edition (ISO/IEC 16449:1999), which has been technically
revised.
Annexes A to J form a normative part of this International Standard. Annexes K to P are for information only.

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INTERNATIONAL STANDARD ISO/IEC 16449:2002(E)

Information technology — 80 mm DVD — Read-only disk


Section 1 - General

1 Scope
This International Standard specifies the mechanical, physical and optical characteristics of a 80 mm, read-only optical disk to
enable the interchange of such disks. It specifies the quality of the recorded signals, the format of the data and the recording
method, thereby allowing for information interchange by means of such disks. This disk is identified as DVD - Read-Only Disk.
This International Standard specifies
− four related but different Types of this disk (see clause 7),
− the conditions for conformance,
− the environments in which the disk is to be operated and stored,
− the mechanical and physical characteristics of the disk, so as to provide mechanical interchange between data processing
systems,
− the format of the information on the disk, including the physical disposition of the tracks and sectors, the error correcting
codes and the coding method used,
− the characteristics of the signals recorded on the disk, enabling data processing systems to read the data from the disk.
This International Standard provides for interchange of disks between disk drives. Together with a standard for volume and file
structure, it provides for full data interchange between data processing systems.
2 Conformance
2.1 Optical Disk
A claim of conformance shall specify the Type of the disk. An optical disk shall be in conformance with this International
Standard if it meets the mandatory requirements specified for its Type.
2.2 Generating system
A generating system shall be in conformance with this International Standard if the optical disk it generates is in accordance
with 2.1.
2.3 Receiving system
A receiving system shall be in conformance with this International Standard if it is able to handle all four Types of optical disk
according to 2.1.
3 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of this
International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply.
However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying
the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative
document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
IEC 60950-1:2001, Information technology equipment – Safety – Part 1: General requirements
4 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply.
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ISO/IEC 16449:2002(E)
4.1 Adhesive layer
A layer of adhesive material bonding together the two parts of the disk.
4.2 Channel bit
The elements by which, after modulation, the binary values ZERO and ONE are represented on the disk by pits.
4.3 Clamping Zone
The annular part of the disk within which a clamping force is applied by a clamping device.
4.4 Digital Sum Value (DSV)
The arithmetic sum obtained from a bit stream by allocating the decimal value 1 to bits set to ONE and the decimal value -1 to
bits set to ZERO.
4.5 Disk Reference Plane
A plane defined by the perfectly flat annular surface of an ideal spindle onto which the Clamping Zone of the disk is clamped,
and which is normal to the axis of rotation.
4.6 Dual Layer disk
A optical disk with one or two entrance surface(s), in which each entrance surface gives access to a different pair of recorded
layers.
4.7 Dummy substrate
A layer which may be transparent or not, provided for the mechanical support of the disk and/or of a recorded layer.
4.8 Entrance surface
The surface of the disk onto which the optical beam first impinges.
4.9 Optical disk
A disk that accepts and retains information in the form of pits in a recorded layer that can be read by an optical beam.
4.10 Physical sector number
A serial number allocated to physical sectors on the disk.
4.11 Read-only disk
An optical disk in which the information has been recorded when manufacturing the disk. The information cannot be modified
and can only be read from the disk.
4.12 Recorded layer
A layer of the disk on, or in, which data is recorded.
4.13 Reed-Solomon code
An error detection and/or correction code for the correction of errors.
4.14 Reserved field
A field set to all ZEROs unless otherwise stated, and reserved for future standardization.
4.15 Sector
The smallest part of a track in the Information Zone that can be accessed independently of other addressable parts.
4.16 Single Layer disk
An optical disk with one or two entrance surface(s), in which each entrance surface gives access to a different recorded layer.
4.17 Spacer
In the case of Dual Layer disks, the transparent layer placed between the two recorded layers accessible through the same
entrance surface.
4.18 Substrate
A transparent layer of the disk, provided for mechanical support of the recorded layer(s), through which the optical beam can
access the recorded layer(s).
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ISO/IEC 16449:2002(E)
4.19 Track
A 360° turn of a continuous spiral.
4.20 Track pitch
The distance between the centrelines of a pair of adjacent physical tracks, measured in radial direction.
4.21 Zone
An annular area of the disk.
5 Conventions and notations
5.1 Representation of numbers
A measured value is rounded off to the least significant digit of the corresponding specified value. For instance, it implies that a
specified value of 1,26 with a positive tolerance of + 0,01 and a negative tolerance of - 0,02 allows a range of measured values
from 1,235 to 1,275.
Numbers in decimal notations are represented by the digits 0 to 9.
Numbers in hexadecimal notation are represented by the hexadecimal digits 0 to 9 and A to F in parentheses.
The setting of bits is denoted by ZERO and ONE.
Numbers in binary notations and bit patterns are represented by strings of digits 0 and 1, with the most significant bit shown to
the left.
Negative values of numbers in binary notation are given as Two’s complement.
In each field the data is recorded so that the most significant byte (MSB), identified as Byte 0, is recorded first and the least
significant byte (LSB) last.
In a field of 8n bits, bit b shall be the most significant bit (msb) and bit b the least significant bit (lsb).
(8n-1) 0
Bit b is recorded first.
(8n-1)
5.2 Names
The names of entities, e.g. specific tracks, fields, zones, etc. are given a capital initial.
6 List of acronyms
BCA Burst-Cutting Area
BP Byte Position
BPF Band Pass Filter
CLV Constant Linear Velocity
CPR_MAI Copyright Management Information
DCC DC Component (suppress control)
DL Dual Layer
DPD Differential Phase Detection
DSV Digital Sum Value
ECC Error Correction Code
EDC Error Detection Code
EQ Equalizer
FWHM Full Width at Half Maximum
HF High Frequency
ID Identification Data
IED ID Error Detection (code)
IR Index of Refraction
LPF Low-Pass Filter
LSB Least Significant Byte
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ISO/IEC 16449:2002(E)
MSB Most Significant Byte
NRZ Non Return to Zero
NRZI Non Return to Zero Inverted
OTP Opposite Track Path
PBS Polarizing Beam Splitter
PE Phase Encoding
PI Parity (of the) Inner (code)
PLL Phase-Locked Loop
PO Parity (of the) Outer (code)
PTP Parallel Track Path
PUH Pick-Up Head
RIN Relative Intensity Noise
RS Reed-Solomon (code)
RZ Return to Zero
SL Single Layer
SYNC Code Synchronisation Code
lsb least significant bit
msb most significant bit
7 General description of the disk
The optical disk that is the subject of this International Standard consists of two substrates bonded together by an adhesive
layer, so that the recorded layers are on the inside (See annex N). The centring of the disk is performed on the edge of the
centre hole of the assembled disk on the side currently read. Clamping is performed in the Clamping Zone. This International
Standard specifies the following Types.
Type A consists of a substrate, a single recorded layer and a dummy substrate. The recorded layer can be accessed
from one side only. The nominal capacity is 1,46 Gbytes.
Type B consist of two substrates, and two recorded layers. From one side of the disk, only one of these recorded
layers can be accessed. The nominal capacity is 2,92 Gbytes.
Type C consists of a substrate, a dummy substrate and two recorded layers with a spacer between them. Both
recorded layers can be accessed from one side only. The nominal capacity is 2,66 Gbytes.
Type D consists of two substrates, each having two recorded layers with a spacer between these two recorded
layers. From one side of the disk, only one pair of recorded layers can be accessed. The nominal capacity
is 5,32 Gbytes.
Figure 1 shows schematically these four Types. Types A and B are Single Layer (SL) disks and Types C and D are Dual Layer
(DL) disks. The two layers of DL disks are identified as Layer 0 and Layer 1. Layer 0 is the layer nearer to the entrance surface.
Types A and C are 1-sided disks, Types B and D are 2-sided disks.
In Type C the function of the adhesive layer can be provided by the spacer between the two recorded layers where Layer 1 is
placed, for instance embossed, on the dummy substrate.
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ISO/IEC 16449:2002(E)

Figure 1 - Types of 80 mm DVD - Read-Only disks
8 General requirements
8.1 Environments
8.1.1 Test environment
The test environment is the environment where the air immediately surrounding the disk has the following properties.
a) For dimensional measurements  b) For other measurements
temperature : 23 °C ± 2 °C  15 °C to 35 °C
relative humidity : 45 % to 55 %  45 % to 75 %
atmospheric pressure : 86 kPa to 106 kPa  86 kPa to 106 kPa
Unless otherwise stated, all tests and measurements shall be made in this test environment.
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ISO/IEC 16449:2002(E)
8.1.2 Operating environment
This International Standard requires that an optical disk which meets all mandatory requirements of this International Standard
in the specified test environment provides data interchange over the specified ranges of environmental parameters in the
operating environment.
Disks used for data interchange shall be operated under the following conditions, when mounted in the drive supplied with
voltage and measured on the outside surface of the disk.
The disk exposed to storage conditions shall be conditioned in the operating environment for at least two hours before
operating.
temperature : -25 °C to 70 °C
relative humidity : 3 % to 95 %
3 3
absolute humidity : 0,5 g/m to 60 g/m
sudden change of temperature : 50 °C max.
sudden change of relative humidity : 30 % max.
There shall be no condensation of moisture on the disk.
8.1.3 Storage environment
The storage environment is the environment where the air immediately surrounding the optical disk shall have the following
properties.
temperature : -20 °C to 50 °C
relative humidity : 5 % to 90 %
3 3
absolute humidity : 1 g/m to 30 g/m
atmospheric pressure : 75 kPa to 106 kPa
temperature variation : 15 °C /h max.
relative humidity variation : 10 %/h max.
8.1.4 Transportation
This International Standard does not specify requirements for transportation; guidance is given in annex P.
8.2 Safety requirements
The disk shall satisfy the requirements of Standard IEC 60950-1, when used in the intended manner or in any foreseeable use in
an information system.
8.3 Flammability
The disk shall be made from materials that comply with the flammability class for HB materials, or better, as specified in
Standard IEC 60950-1.
9 Reference measurement devices
The reference measurement devices shall be used for the measurements of optical parameters for conformance with this
International Standard. The critical components of these devices have specific properties defined in this clause.
9.1 Pick Up Head (PUH)
The optical system for measuring the optical parameters is shown in figure 2. It shall be such that the detected light reflected
from the entrance surface of the disk is minimized so as not influencing the accuracy of measurement. The combination of the
polarizing beam splitter C with the quarter-wave plate D separates the incident optical beam and the beam reflected by the
optical disk F. The beam splitter C shall have a p-s intensity/reflectance ratio of at least 100. Optics G generates an astigmatic
difference and collimates the light reflected by the recorded layer of the optical disk F for astigmatic focusing and read-out. The
position of the quadrant photo detector H shall be adjusted so that the light spot becomes a circle the centre of which coincides
with the centre of the quadrant photo detector H when the objective lens is focused on the recorded layer. An example of such a
photo detector H is shown in figure 2. The dimensions a and b equal M times 10 µm to 12 µm, where M is the transversal
magnification factor from the disk to its conjugate plane near the quadrant photo detector H.
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ISO/IEC 16449:2002(E)

A Laser diode F Optical disk
B Collimator lens G Optics for the astigmatic focusing method
C Polarizing beam splitter H Quadrant photo detector
D Quarter-wave plate I , I , I , I Output from the quadrant photo detector
a b c d
E Objective lens J d.c. coupled amplifier

Figure 2 - Optical system for PUH
The characteristics of the PUH shall be as follows.
Wavelength (λ)  650 nm ± 5 nm
Polarization  circularly polarized light
Polarizing beam splitter  shall be used unless otherwise stated
Numerical aperture  0,60 ± 0,01
Light intensity at the rim of
the pupil of the objective lens 60 % to 70 % of the maximum intensity level in radial direction, and over 90 % of
   the maximum intensity level in tangential direction
Wave front aberration after
passing through an ideal
substrate of the single layer disk 0,033 λ rms max.
(Thickness : 0,6 mm and index
of refraction : 1,56)
2 2 2
Normalized detector size on a disk 100 µm ‹ S / M ‹ 144 µm
   where S is the total surface of the photo detector of the PUH
Relative intensity noise (RIN) - 134 dB/Hz max.
10 log [(a.c. light power density /Hz) / d.c. light power ]
9.2 Measurement conditions
The measuring conditions for operational signals shall be as follows.
Scanning velocity at a Channel bit rate
of 26,15625 Mbits/s  for Single Layer disks: 3,49 m/s ± 0,03 m/s
   for Dual Layer disks:  3,84 m/s ± 0,03 m/s
Clamping force  2,0 N ± 0,5 N
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ISO/IEC 16449:2002(E)
Taper cone angle  40,0° ± 0,5°, see annex E
CLV servo characteristic  ƒ (-3 dB), closed loop bandwidth : 5 Hz
Focusing method  astigmatic method
Tracking method  differential phase detection
9.3 Normalized servo transfer function
In order to specify the servo system for axial and radial tracking, a function H is used (equation I). It specifies the nominal
s
values of the open-loop transfer function H of the Reference Servo(s) in the frequency range 23,1 Hz to 10 kHz.
3iω
1+
2
1ωω
oo

H ()iω =× × (I)
s 
iω
3 iω

1+
3ω
o
where
ω = 2πƒ
ω =2πƒ
o o
i = −1
ƒ is the 0 dB crossover frequency of the open loop transfer function. The crossover frequencies of the lead-lag network of the
o
servo are given by
lead break frequency: ƒ = ƒ × 1/3
1 o
lag break frequency ƒ = ƒ × 3
2 o
9.4 Reference Servo for axial tracking
For an open loop transfer function H of the Reference Servo for axial tracking, 1+H is limited as schematically shown by the
shaded surface of figure 3.

Figure 3 - Reference Servo for axial tracking
Bandwidth 100 Hz to 10 kHz
 1 + H  shall be within 20 % of 1+H .
s
The crossover frequency ƒ = ω / 2π shall be specified by equation (II), where α shall be 1,5 times larger than the expected
o o max
2
maximum axial acceleration of 8 m/s . The tracking error e shall not exceed 0,23 µm. Thus the crossover frequency ƒ shall
max o
be
113 α 8××1,53
max
f = == 2,0 kHz   (II)
0
−6
22ππe
0,23 ×10
max
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ISO/IEC 16449:2002(E)
The axial tracking error e is the peak deviation measured axially above or below the 0 level.
max
Bandwidth 23,1 Hz to 100 Hz
 1 + H  shall be within the limits defined by the following four points.
40,6 dB at 100 Hz  ( 1 + Hs  - 20% at 100 Hz )
66,0 dB at 23,1 Hz  ( 1 + Hs  - 20% at 23,1 Hz )
86,0 dB at 23,1 Hz  ( 1 + Hs  - 20% at 23,1 Hz add 20 dB)
44,1 dB at 100 Hz  ( 1 + Hs  + 20% at 100 Hz )
Bandwidth 9,6 Hz to 23,1 Hz
1 + H shall be between 66,0 dB and 86,0 dB.
9.5 Reference Servo for radial tracking
For an open-loop transfer function H of the Reference Servo for radial tracking, 1+H is limited as schematically shown by
the shaded surface of figure 4.

Figure 4 - Reference Servo for Radial Tracking
Bandwidth from 100 Hz to 10 kHz
1 + H shall be within 20 % of1 + H .
s
The crossover frequency ƒ = ω / 2π shall be specified by equation (III), where α shall be 1,5 times larger than the
o o max
2
expected maximum radial acceleration of 1,1 m/s . The tracking error e shall not exceed 0,022 µm. Thus the crossover
max
frequency ƒ shall be
o
113 α 1,1××1,53
max
 f = == 2,4 kHz   (III)
0
−6
22ππe
0,022 ×10
max
The radial tracking error e is the peak deviation measured radially inwards or outwards the 0 level.
max
Bandwidth from 23,1 Hz to 100 Hz
 1 + H  shall be within the limits defined by the following four points.
43,7 dB at 100 Hz  ( 1 + Hs  - 20% at 100 Hz )
69,2 dB at 23,1 Hz  ( 1 + Hs  - 20% at 23,1 Hz )
89,2 dB at 23,1 Hz  ( 1 + Hs  - 20% at 23,1 Hz add 20 dB)
47,3 dB at 100 Hz  ( 1 + Hs  + 20% at 100 Hz )
Bandwidth from 9,6 Hz to 23,1 Hz
 1 + H  shall be between 69,2 dB and 89,2 dB.
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ISO/IEC 16449:2002(E)
Section 2 - Dimensional, mechanical and physical characteristics of the disk
10 Dimensional characteristics (figures 5 to 8)
Dimensional characteristics are specified for those parameters deemed mandatory for interchange and compatible use of the
disk. Where there is freedom of design, only the functional characteristics of the elements described are indicated. The enclosed
drawings show the dimensional requirements in summarized form. The different parts of the disk are described from the centre
hole to the outside rim.
The dimensions are referred to two Reference Planes P and Q.
Reference Plane P is the primary Reference Plane. It is the plane on which the bottom surface of the Clamping Zone (see 10.4)
rests.
Reference Plane Q is the plane parallel to Reference Plane P at the height of the top surface of the Clamping Zone.
10.1 Overall dimensions
The disk shall have an overall diameter
d = 80,00 mm ± 0,30 mm
1
The centre hole of a substrate or a dummy substrate shall have a diameter
 + 0,15 mm
d = 15,00 mm
2
 - 0,00 mm
The diameter of the hole of an assembled disk, i.e. with both parts bonded together, shall be 15,00 mm min., see figure 6.
There shall be no burr on both edges of the centre hole.
The edge of the centre hole shall be rounded off or chamfered. The rounding radius shall be 0,1 mm max. The chamfer shall
extend over a height of 0,1 mm max.
The thickness of the disk, including adhesive layer, spacer(s) and label(s), shall be
 + 0,30 mm
e = 1,20 mm
1
 - 0,06 mm
10.2 First transition area
In the area defined by d and
2
d = 16,0 mm min.
3
the surface of the disk is permitted to be above Reference Plane P and/or below Reference Plane Q by 0,10 mm max.
10.3 Second transition area
This area shall extend between diameter d and diameter
3
d = 22,0 mm max.
4
In this area the disk may have an uneven surface or burrs up to 0,05 mm max. beyond Reference Planes P and/or Q.
10.4 Clamping Zone
This zone shall extend between diameter d and diameter
4
d = 33,0 mm min.
5
Each side of the Clamping Zone shall be flat within 0,1 mm. The top side of the Clamping Zone, i.e. that of Reference Plane Q
shall be parallel to the bottom side, i.e. that of Reference Plane P within 0,1 mm.
In the Clamping Zone the thickness e of the disk shall be
2
 + 0,20 mm
e = 1,20 mm
2
 - 0,10 mm
10.5 Third transition area
This area shall extend between diameter d and diameter
5
© ISO/IEC 2002 – All rights reserved
10

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ISO/IEC 16449:2002(E)
d = 44,0 mm max.
6
In this area the top surface is permitted to be above Reference Plane Q by
h = 0,25 mm max.
1
or below Reference Plane Q by
h = 0,10 mm max.
2
The bottom surface is permitted to be above Reference Plane P by
h = 0,10 mm max
3
or below Reference Plane P by
h = 0,25
...