1、Standard ECMA-273February 1998Standardizing Information and Communication SystemsPhone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.chCase for 120 mm DVD-RAM Disks.Standard ECMA-273February 1998Standardizing Information and Communication SystemsPhone: +
2、41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.chMB Ecma-273.doc 12-02-98 16,10Case for 120 mm DVD-RAM Disks.Brief HistoryECMA Technical Committee TC31 was established in 1984 for the standardization of Optical Disks and Optical DiskCartridges (ODC). Since
3、its establishment, the Committee has made major contributions to ISO/IEC toward the development ofInternational Standards for 80 mm, 90 mm, 120 mm, 300 mm, and 356 mm media. Numerous standards have been developedby TC31 and published by ECMA, almost all of which have also been adopted by ISO/IEC und
4、er the fast-track procedure asInternational Standards.In February 1997 a group of ten Companies, known as the DVD Forum, proposed to TC31 to develop standards for the opticaldisks known as DVD disks. TC31 accepted this proposal and started the work that has led to standardsECMA-267(1997) 120 mm DVD-
5、Read-Only DiskECMA-268 (1997) 80 mm DVD-Read-Only DiskFurther work, supported by nine members of the DVD Forum, has been undertaken for a rewritable disk known as DVD-RAMwhich has led to StandardECMA-272 (1998) 120 mm DVD Rewritable Disk (DVD-RAM)ECMA Technical Committee TC15 is responsible for the
6、development and maintenance of Standards and Technical Reportsfor volume and file structure for optical disks.This ECMA Standard specifies a case for use with the disk specified in Standard ECMA-272 so as to form an optical diskcartridge. Three Types are specified that allow to meet the requirements
7、 of applications for which such cartridges are used. It isexpected that a corresponding International Standard will be adopted by ISO/IEC.This ECMA Standard has been adopted by the General Assembly in February 1998.- i -Table of ContentsSection 1 - General 11 Scope 12 Conformance 13 Reference 14 Def
8、initions 14.1 Cartridge 14.2 Case 15 Conventions and notations 15.1 Representation of numbers 15.2 Names 16 General description of the case 26.1 General description of the Type 1 case 26.2 General description of the Type 2 case 26.3 General description of the Type 3 case 27 General requirements 37.1
9、 Environments 37.1.1 Test environment 47.1.2 Operating environment 37.1.3 Storage environment 47.1.4 Transportation 47.2 Temperature shock 47.3 Safety requirement 47.4 Flammability 4Section 2 - Dimensional and Mechanical characteristics of the case 48 Dimensional characteristics 48.1 Dimensions of t
10、he Type 1 case 48.1.1 Overall dimensions 58.1.2 Location hole 68.1.3 Alignment hole 68.1.4 Reference surfaces 68.1.5 Insertion slots 68.1.6 Detents 78.1.7 Gripper slots 78.1.8 Write-inhibit hole 88.1.9 Sensor holes 88.1.10 Sensing areas 98.1.11 Spindle and head windows 98.1.12 Shutter shape 108.1.13
11、 Path for shutter opener 108.1.14 Label area 11- ii -8.1.15 Identification marks for Sides A and B 118.2 Dimensions of the Type 2 case 238.2.1 Overall dimensions 238.2.2 Location hole 248.2.3 Alignment hole 248.2.4 Reference surfaces 248.2.5 Insertion slot 258.2.6 Detents 258.2.7 Gripper slots 268.2
12、.8 Write-inhibit hole 268.2.9 Sensor holes 268.2.10 Sensing areas 278.2.11 Spindle and head windows 278.2.12 Shutter shape 288.2.13 Path for shutter opener 298.2.14 Label area 298.2.15 Identification mark for Side A 298.2.16 Opening and opening cover for taking the disk out of the case 308.3 Dimensi
13、ons of the Type 3 case 408.3.1 Sensor holes 418.3.2 Opening and opening cover 419 Mechanical characteristics 419.1 Material 419.2 Mass 419.3 Edge distortion 419.4 Compliance 419.5 Shutter opening force 4110 Interface between the case used as cartridge and a drive 4110.1 Capture cylinder 4110.2 Inner
14、 dimensions of the case 4211 Orientation of the disk in the case 4411.1 Two-sided disk (Type 2S) in case Type 1 4411.2 One-sided disk (Type 1S) in case Types 1, 2 and 3 44Annex A - Position of the case relative to the Reference Planes 45Annex B - Edge distortion test 47Annex C - Compliance test 49An
15、nex D - Examples of an opening cover for Type 2 or Type 3 cases 51Annex E - Transportation 53Section 1 - General1ScopeThis ECMA Standard specifies the characteristics of a case for use with 120 mm DVD-RAM disks as specified inStandard ECMA-272. The present ECMA Standard specifies three related, but
16、different implementations of such cases,viz.Type 1 Provides a case for a one-sided (Type 1S) or a two-sided (Type 2S) DVD-RAM disk such that the disk cannot be removed from the case. This case is reversible.Type 2 Provides a case for a one-sided DVD-RAM disk (Type 1S) such that the disk may be remov
17、ed from thecase. This case is not reversible.Type 3 Provides a case into which a one-sided DVD-RAM disk (Type 1S) may be inserted, then used as acartridge. This case is not reversible.This ECMA Standard specifiesG01 the environments in which the cases are to be operated and stored;G01 the dimensiona
18、l and mechanical characteristics of the case, so as to provide mechanical interchangeability betweendata processing systems;This ECMA Standard provides for mechanical interchange between optical disk drives. Together with StandardECMA-272 for 120 mm DVD-RAM disks and a standard for volume and file s
19、tructure, it provides for full datainterchange between data processing systems.2 ConformanceA claim of conformance with this ECMA Standard shall specify the Type implemented. A case shall be inconformance with this ECMA Standard if it meets the mandatory requirements specified herein for its Type.3
20、ReferenceECMA-129 Information Technology Equipment - Safety (1994)ECMA-272 120 mm DVD Rewritable Disk (DVD-RAM) (1998)4 DefinitionsFor the purpose of this ECMA Standard the following definitions apply.4.1 CartridgeA device consisting of a case containing a rewritable disk.4.2 CaseThe housing for an
21、optical disk, that protects the disk and facilitates disk interchange.5 Conventions and notations5.1 Representation of numbersA measured value is rounded off to the least significant digit of the corresponding specified value. For instance, itimplies that a specified value of 1,26 with a positive to
22、lerance of + 0,01 and a negative tolerance of - 0,02 allows arange of measured values from 1,235 to 1,275.5.2 NamesThe names of entities, e.g. specific sides, etc. are given a capital initial.- 2 -6 General description of the case6.1 General description of the Type 1 case (Figure 1)The case is a rig
23、id protective container of rectangular shape. Sides A and B of the case are identical as far as thefeatures given here are concerned. References to Sides A and B of the case can be changed to B or A respectively.When the opening of the one is a head and spindle window for the spindle and the optical
24、 head of the drive, that ofthe other is an access window for the disk clamping apparatus. A shutter uncovers the windows upon insertion intothe drive, and automatically covers them upon removal from the drive. The case has features that enable a drive toreject a mis-inserted cartridge, to inhibit wr
25、iting, sensor holes, detents for autoloading and a vertical use, gripperslots for an autochanger, label areas and side identification marks.Sides A and B of the case have the same configuration.6.2 General description of the Type 2 case (Figure 2)The Type 2 case has the same features as the Type 1 c
26、ase, but with some differences. The shape of the case isdifferent on Side A and on Side B. Side A does not need to have a location hole, an alignment hole, ReferenceSurfaces, a write-inhibit hole, sensor holes and sensing areas. The case has an opening closed by a cover. This covercan be opened. In
27、open position, the disk can be taken out of the case. Sensor hole A1 is originally closed. When thedisk has been removed from the case, then this hole remains permanently open, indicating that the original diskcontained in the case has been removed at least once or has been replaced by another disk.
28、6.3 General description of the Type 3 case (Figure 2)The Type 3 case is identical with Type 2 case except that the sensor hole A1 is always open.Edge for shutter openerShutterCase Side ADisk Side BDetent for vertical useSensing areaGripper slotAlignment holeLabel areaLocation holeSensor holesfor dis
29、k Side BWrite-inhibit holefor disk Side BDetent forautoloadingIdentification markof Case Side AReference surface S3Reference surface S1G01Reference surface S2Reference surface S4Spindle and head windowsInsertion slot97-0092-AFigure 1 - General view of the Type 1 case, seen from Side A- 3 -Edge for t
30、he shutter openerShutterCase Side ADisk Side BDetent for vertical useGripper slotOpening coverLabel areaDetent forautoloadingIdentification m arkof Case Side ASpindle and head windowsInsertion slot97-0093-AFigure 2 - General view of the Type 2 and Type 3 cases, seen from Side A7 General requirements
31、7.1 Environments7.1.1 Test environmentThe test environment is the environment where the air immediately surrounding the case has the followingproperties:Temperature : 23 C 2 CRelative humidity : 50 % 5 %Atmospheric pressure : 86 kPa to 106 kPaNo condensation on or in the case or cartridge shall occu
32、r. Before testing, the case or cartridge shall beconditioned in this environment for 48 hours minimum.Unless otherwise stated, all tests and measurements shall be made in this test environment.7.1.2 Operating environmentThis ECMA Standard requires that a case which meets all requirements of this ECM
33、A Standard in the specifiedtest environment provides mechanical interchange over the specified ranges of environmental parameters in theoperating environment. When the case according to this ECMA Standard contains a DVD-RAM disk accordingto Standard ECMA-272, they constitute together a cartridge. Th
34、is cartridge shall meet the requirements of thisclause and provides for data interchange.- 4 -The operating environment is the environment where the air immediately surrounding the case or cartridge hasthe following properties:Temperature : 5 C to 60 CRelative humidity : 3 % to 85 %Absolute humidity
35、 : 1 g/m3to 30 g/m3Temperature gradient : 10 C /h max.Relative humidity gradient : 10 %/h max.No condensation on or in the case or cartridge shall occur. If the case or cartridge has been exposed to conditionsoutside those specified in this clause, it shall be acclimatized in the operating environme
36、nt for at least 2 h beforeuse.7.1.3 Storage environmentThe storage environment is defined as an environment where the air immediately surrounding the case orcartridge has the following properties.Temperature : -10 C to 50 CRelative humidity : 3 % to 85 %Absolute humidity : 1 g/m3to 30 g/m3Atmospheri
37、c pressure : 75 kPa to 106 kPaTemperature gradient : 10 C /h max.Relative humidity gradient : 10 %/h max.No condensation on or in the case or cartridge shall occur.7.1.4 TransportationThis ECMA Standard does not specify requirements for transportation; guidance is given in annex E.7.2 Temperature sh
38、ockThe case shall be withstand a temperature shock of up to 20G03C when inserted into, or removed from, the drive.7.3 Safety requirementThe case shall satisfy the safety requirements of Standard ECMA-129, when used in the intended manner or in anyforeseeable use in an information processing system.7
39、.4 FlammabilityThe case shall be made from materials that comply with the flammability class for HB materials, or better, asspecified in Standard ECMA-129.Section 2 - Dimensional and Mechanical characteristics of the case8 Dimensional characteristicsThe dimensions of the case shall be referred to th
40、ree orthogonal Reference Planes X, Y and Z. The case shall beconstrained such that four reference surfaces S1 to S4 on Side B of the case lie in Reference Plane Z. The intersectionof the three planes defines the centre of the location hole. The centre of the alignment hole shall lie on the intersect
41、ionof Reference Planes X and Z. Refer to annex A. A dimension of a feature referenced to one of the planes is the shortestdistance from the feature to the plane.Side A of the Type 1 case is referred to the three orthogonal Reference Planes X, Y and Z, where- Y is a plane parallel to Reference Plane
42、Y at a nominal distance of 102,0 mm,- Z is a plane parallel to Reference Plane Z at a nominal distance of 8,0 mm.8.1 Dimensions of the Type 1 caseThe dimensions of the Type 1 case shall be measured in the test environment. The dimensions of the case in anoperating environment can be estimated from t
43、he dimensions specified in this clause.- 5 -8.1.1 Overall dimensions (Figure 3)The total length of the case shall beL101= 135,5 mm 0,4 mm.The distance from the top of the case to Reference Plane X shall be+ 0,3 mmL102= 112,5 mmG01 0,2 mmwith the widthL103= 3,6 mm min.from the left-hand and right-han
44、d edges of the case.The distance from the bottom of the case to Reference Plane X shall beL104= 23,0 mm 0,2 mm.The total width of the case shall be+ 0,0 mmL105= 124,6 mmG01 0,5 mm.The distance from the left-hand side of the case to Reference Plane Y shall be+ 0,2 mmL106= 113,3 mmG01 0,4 mm.The dista
45、nce from the right-hand side of the case to Reference Plane Y shall be+ 0,1 mmL107= 11,3 mmG01 0,3 mm.The two corners of the top shall be rounded with a radiusR101= 4,0 mm 0,2 mmcentred atL108= 4,0 mm 0,1 mmfrom the edge of the case andL109= 3,5 mm 0,1 mmfrom the top of the case.The two corners of t
46、he bottom shall be rounded with a radiusR102= 4,0 mm 0,2 mm.In the zones delimited byL110= 6,0 mmfrom the left-hand and right-hand edges of the case, there shall be the continuous guide areas running from thetop to Reference Plane X of the case, with a widthL111= 0,8 mm min.the thickness of the case
47、 shall be+ 0,2 mmL112= 8,0 mmG01 0,1 mm.The eight long edges of the case shall be rounded with a radiusR103= 0,5 mm 0,1 mm.- 6 -8.1.2 Location hole (Figure 3)The centre of the location hole shall coincide with the intersection of Reference Planes X, Y and Z.The diameter of the hole shall be+ 0,05 mm
48、D101= 4,00 mmG01 0,00 mmits depth shall beL113= 1,2 mm min.The room below the location hole shall be free up toL114= 5,0 mm min.below Reference Plane ZThe diameter of the free room shall be at least equal to D101.The lead-in edges shall be rounded with a radiusR104= 0,5 mm 0,1 mm.8.1.3 Alignment hol
49、e (Figure 3)The centre of the alignment hole shall lie on the intersection of the Reference Planes X and Z at a distanceL115= 102,0 mm 0,2 mmfrom Reference Plane Y.The alignment hole shall have a substantially rectangular shape. Its dimensions shall be+ 0,05 mmL116= 4,00 mmG01 0,00 mm+ 0,2 mmL117= 5,6 mmG01 0,0 mmits depth shall be equal to L113. The room below the alignment hole shall be free up to at least L114. Thedimensions of the free room shall be at least L116and L117.The lead-in edges shall be rounded with a radius R104.8.1.4 Reference surfaces
