发明名称 |
LAYER-LAYER REGISTRATION COUPON FOR PRINTED CIRCUIT BOARDS |
摘要 |
A method and apparatus for determining misregistration of internal layers of a PCB using resistance measurements is disclosed. In one embodiment, a method includes measuring a first resistance between a first center terminal and a first peripheral terminal of a first registration coupon on a printed circuit board (PCB) panel (10) including at least one PCB (15). The method further includes measuring a second resistance between the first center terminal and a second peripheral terminal of the first registration coupon, wherein the first and second peripheral terminals are associated with a first internal layer of the PCB. A difference between the first and second resistances is then calculated. Then, based on this difference, a determination is made of a distance of misregistration of the first internal layer, if any, along a first axis. |
申请公布号 |
WO2017040135(A1) |
申请公布日期 |
2017.03.09 |
申请号 |
WO2016US48338 |
申请日期 |
2016.08.24 |
申请人 |
ORACLE INTERNATIONAL CORPORATION |
发明人 |
MORAN, Stephanie;FREDA, Michael, C.;SAUTER, Karl |
分类号 |
H05K3/46;H05K1/02;H05K1/16;H05K3/00 |
主分类号 |
H05K3/46 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|