Colored soldered composition
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United States of America Patent
Stats
-
Jul 22, 1997
Grant Date -
N/A
app pub date -
Nov 16, 1994
filing date -
Jun 3, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a method of infusing coloration in solder to facilitate inspection of soldered portions in the production of electronic machinery, equipment and apparatus, and further, a method of forming a colored membrane on the surface of the soldered portions by employing colored solder materials. Physically and chemically stable colored powders composed of rare earth compounds or metallic fluoride compounds, having properties of specific gravity lighter than that of solder and further being indecomposable even at a temperature higher than that of the melting points of solders, are mixed into flux. After soldering by employing solder cream containing the mixture, a colored membrane or layer may be formed on the surface of soldered portions by deposition of the colored powder compounds.
First Claim
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 13 Citation Count
- B23K Class
- 68.66 % this patent is cited more than
- 28 Age