Method for reproducing printed circuit boards for semiconductor packages including poor quality printed circuit board units and method for fabricating semiconductor packages using the reproduced printed circuit boards
US5897334A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 15, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Oct 15, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/1545
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for reproducing a PCB strip for semiconductor packages, wherein a poor quality PCB unit included in the PCB strip is replaced with a normal quality one, thereby achieving a reduction in the amount of package materials used and an improvement in the process efficiency. The invention also provides a method for fabricating semiconductor packages using the PCB strip reproduction method. A desired portion of a poor quality PCB unit included in a PCB strip is cut out in such a manner that a cutting opening having a peripheral edge extending along the singulation line of the poor quality PCB unit or along a region defined between the singulation line and anti-bending slots of the poor quality PCB unit. In the cutting opening, a separate good quality PCB unit member having the same shape and size as the cutting opening is then fitted. Thus, it is possible to simply and efficiently replace PCB units determined to be of poor quality with separate good quality PCB unit members, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.