Structure of a ball grid array substrate with charts for indicating position of defective chips
US6274883A · kind A · utility
0Cited by
4References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1999 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Dec 13, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A ball grid array substrate includes a circumferential edge provided with a plurality of charts each having a plurality of lattices corresponding to positions of chips on the ball grid array substrate for indicating positions of defective chips in different packaging procedures whereby positions of the defective chips can be easily observed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.