Circuit board having a predetermined punch area and sheet separated from the same
A circuit board includes a substrate, a first measurement mark and a second measurement mark, the first and second measurement marks are located on a predetermined punch area of the substrate. After punching, the predetermined punch area is removed such that the circuit board has a through hole and...
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creator | Lee, Chun-Te Lien, Yi-Chen Huang, Yen-Ping Peng, Chih-Ming Huang, Hui-Yu |
description | A circuit board includes a substrate, a first measurement mark and a second measurement mark, the first and second measurement marks are located on a predetermined punch area of the substrate. After punching, the predetermined punch area is removed such that the circuit board has a through hole and a sheet is separated from the circuit board. By the first and second measurement marks on the sheet, a first distance between a first edge of the sheet and the first measurement mark and a second distance between a second edge of the sheet and the second measurement mark can be measured to determine whether the through hole is shifted or has an incorrect size. |
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subjects | CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS PRINTED CIRCUITS |
title | Circuit board having a predetermined punch area and sheet separated from the same |
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