Browse Prior Art Database

Method for the Early Detection of Flux Bath Degradation

IP.com Disclosure Number: IPCOM000052440D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Irene, EA: AUTHOR [+2]

Abstract

In semiconductor applications, flux baths of ethyldiaminetetraacetic acid (EDTA) and glycerine used to prepare tin surfaces for soldering degrade and unreliable soldering takes place. The degradation can be measured by suspending a tin sample in the bath during use and recording the weight at equal time intervals.

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

Page 1 of 1

Method for the Early Detection of Flux Bath Degradation

In semiconductor applications, flux baths of ethyldiaminetetraacetic acid (EDTA) and glycerine used to prepare tin surfaces for soldering degrade and unreliable soldering takes place. The degradation can be measured by suspending a tin sample in the bath during use and recording the weight at equal time intervals.

When the etch rate of the tin sample indicates a 10 to 20% reduction in the amount of tin etched in a given unit of time, the effectiveness of the bath has degraded and unreliable soldering may occur.

1