JPS556280A - Warp selecting and testing method of substrate - Google Patents
Warp selecting and testing method of substrateInfo
- Publication number
- JPS556280A JPS556280A JP7953778A JP7953778A JPS556280A JP S556280 A JPS556280 A JP S556280A JP 7953778 A JP7953778 A JP 7953778A JP 7953778 A JP7953778 A JP 7953778A JP S556280 A JPS556280 A JP S556280A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- warp
- testing method
- distance
- held
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
PURPOSE: To detect the warp of a substrate by dropping a test substrate, which is either placed on a flat table inclined at a preset angle or held at a level from and in parallel with the table, along the table and by measuring the dropping distance.
CONSTITUTION: The flat table T having a length L is inclined at a preset angle θ, and a test substrate S is held at a preset level H from and in parallel with the table T. After that, the substrate S is dropped down onto the table T. And, the distance l the substrate S slides down is measured so that the extent of the warp of the substrate S can be determined from the distance l in view of the chart.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7953778A JPS556280A (en) | 1978-06-29 | 1978-06-29 | Warp selecting and testing method of substrate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7953778A JPS556280A (en) | 1978-06-29 | 1978-06-29 | Warp selecting and testing method of substrate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS556280A true JPS556280A (en) | 1980-01-17 |
Family
ID=13692734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7953778A Pending JPS556280A (en) | 1978-06-29 | 1978-06-29 | Warp selecting and testing method of substrate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS556280A (en) |
-
1978
- 1978-06-29 JP JP7953778A patent/JPS556280A/en active Pending
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