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Browse Prior Art Database

Inspectable Flex Cable to Substrate Connection

IP.com Disclosure Number: IPCOM000103357D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 32K

Publishing Venue

IBM

Related People

Treder, AL: AUTHOR [+2]

Abstract

Described solves the inspection problem encountered when two electrical surfaces are joined by soldering the contact surfaces which become hidden from view during the soldering operation.

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

Inspectable Flex Cable to Substrate Connection

      Described solves the inspection problem encountered when two
electrical surfaces are joined by soldering the contact surfaces
which become hidden from view during the soldering operation.

      This design is desirable when a blind connection results from
two components being joined.  (See the figure.) The flex circuit 1
has copper conductors that are soldered to the substrate 2 I/O pads.
The flex cable is designed with inspection openings 3 beside each
conductor.  The substrate pads and the flex circuit conductors are
pre-tinned prior to assembly and solder reflow.  The substrate pad 2
width is larger than the flex conductors 4 resulting in a solder
fillet 5 that can be inspected from the top coverlay side when
viewing through the inspection openings 3.

      Disclosed anonymously.