发明名称 |
INNER LAYER DEPTH DETECTION DURING CONTROLLED-DEPTH DRILLING USING CONTINUITY TEST COUPON |
摘要 |
A method of detecting depth of a buried target disposed over an intermediate layer within a multi-layer substrate includes forming a test coupon on the intermediate layer during manufacture of the multi-layer substrate, the test coupon including a trace with probe sites at opposite ends; drilling a hole through the trace of the test coupon within the multi-layer substrate; monitoring electrical continuity of the test coupon during the drilling; and determining a depth of the buried target responsive to the monitoring. A hole may then be drilled based on the determined depth. |
申请公布号 |
US2015359110(A1) |
申请公布日期 |
2015.12.10 |
申请号 |
US201414298002 |
申请日期 |
2014.06.06 |
申请人 |
Keysight Technologies, Inc. |
发明人 |
Wright Brian S. |
分类号 |
H05K3/46;H05K3/00 |
主分类号 |
H05K3/46 |
代理机构 |
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代理人 |
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主权项 |
1. A method of detecting depth of a buried target disposed over an intermediate layer within a multi-layer substrate, comprising:
forming a test coupon over the intermediate layer during manufacture of the multi-layer substrate, the test coupon comprising a trace with probe sites at opposite ends; drilling a hole through the trace of the test coupon within the multi-layer substrate; monitoring electrical continuity of the test coupon during said drilling; and determining a depth of the buried target responsive to said monitoring. |
地址 |
Minneapolis MN US |