JPS6442893A - Circuit substrate - Google Patents
Circuit substrateInfo
- Publication number
- JPS6442893A JPS6442893A JP19962487A JP19962487A JPS6442893A JP S6442893 A JPS6442893 A JP S6442893A JP 19962487 A JP19962487 A JP 19962487A JP 19962487 A JP19962487 A JP 19962487A JP S6442893 A JPS6442893 A JP S6442893A
- Authority
- JP
- Japan
- Prior art keywords
- oxygen content
- region
- circuit pattern
- superficial
- composite
- 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
Abstract
PURPOSE:To realize a substrate with a circuit pattern excellent in bonding strength and facilitate identification and inspection of the circuit pattern by a method wherein a composite aluminum nitride plate of aluminum nitride sintered compact, which is composed of two or more regions that are different from each other in oxygen content, is provided. CONSTITUTION:A composite AlN plate substantially formed of AlN sintered compact, which is composed of two or more regions different from each other in oxygen content, tor instance, superficial regions 12 and 13 high oxygen content and another region 11 low in oxygen content, is utilized as a base. Thereby, the region other than the superficial region is excellent in thermal conductivity, a circuit pattern can be adhered to the superficial region of the composite AlN plate with high bonding strength, and the superficial region of the composite AlN plate looks black or milk white due to the high oxygen content and is low in a light transmittance, so that the identification and the inspection of the circuit pattern formed of the superficial region can be easily performed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19962487A JPS6442893A (en) | 1987-08-10 | 1987-08-10 | Circuit substrate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19962487A JPS6442893A (en) | 1987-08-10 | 1987-08-10 | Circuit substrate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6442893A true JPS6442893A (en) | 1989-02-15 |
Family
ID=16410944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19962487A Pending JPS6442893A (en) | 1987-08-10 | 1987-08-10 | Circuit substrate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6442893A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6535790B2 (en) | 2000-02-21 | 2003-03-18 | Kanazawa Institute Of Technology | Automated library system with retrieving and respositing robot |
-
1987
- 1987-08-10 JP JP19962487A patent/JPS6442893A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6535790B2 (en) | 2000-02-21 | 2003-03-18 | Kanazawa Institute Of Technology | Automated library system with retrieving and respositing robot |
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