Browse Prior Art Database

Means to Facilitate Testing of Printed Circuit Boards

IP.com Disclosure Number: IPCOM000118806D
Original Publication Date: 1997-Jul-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 4 page(s) / 41K

Publishing Venue

IBM

Related People

Metzler, N: AUTHOR [+2]

Abstract

Disclosed is a means to allow testing of closed-loop circuits on printed circuit boards.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Means to Facilitate Testing of Printed Circuit Boards

      Disclosed is a means to allow testing of closed-loop circuits
on printed circuit boards.

      Testing of printed circuit board wires that include a closed
loop path is not possible with Direct Current (DC) tests.  High
frequency Alternating Current (AC)-testing is possible but very
expensive.  The loops can be cut through to generate branches that
can be tested separately.  To connect both branches after testing, a
bridge is required that is costly and needs real estate on the board.

      The proposed solution is to do this bridging in a two-part SMD
soldering pad that makes an open loop during manufacture/raw card
test and is closed when soldering paste is applied.  With this, no
extra real  estate is needed (Figs. 1 through 3).