F-28003 G-29220 G-29480 W-26310 Y-27160 Y-27660 P-9320 P-9520 K-7215 88660 88570 88180 88085 88680 74020 89550 F-28005 G-29225 G-29485 W-26315 Y-27165 Y-27665 P-9325 P-9525 K-7218 88760 88670 88280 88185 88780 74025 74110 F-28010 G-29230 G-29490 W-
Electronics Forum | Thu Oct 17 23:25:53 EDT 2002 | redmary
We generally etch the copper back slightly using a 50/50 mix of 3% Hydrogen Peroxide and laboratory grade Ammonium Hydroxide. Swab for about 5 seconds, then rinse. and etch the tin in the solder to further delineate the intermetallic layer that shou
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