Electronics Forum: black dots on gold finger (6)

solder on gold finger

Electronics Forum | Fri Apr 13 22:38:19 EDT 2001 | edylc

Hi , Could you be seeing the nickel under the gold plating because you are removing some of the Gold with the Kapton Tape....?? You mean , the adhesive properties of the kapton tape will cause the gold plating on the gold finger to be somehow peel of

solder on gold finger

Electronics Forum | Fri Apr 13 12:37:35 EDT 2001 | edylc

>>> gold finger was covered by a Kapton tape and it was done offline away from the Screen printer or rather from the SMT lines itself, we are using an ENIG Pcb's , the process doesnt need a wave soldering ....however at the final end of the line ,

Technical Library: black dots on gold finger (1)

NSOP Reduction for QFN RFIC Packages

Technical Library | 2017-08-31 13:43:48.0

Wire bonded packages using conventional copper leadframe have been used in industry for quite some time. The growth of portable and wireless products is driving the miniaturization of packages resulting in the development of many types of thin form factor packages and cost effective assembly processes. Proper optimization of wire bond parameters and machine settings are essential for good yields. Wire bond process can generate a variety of defects such as lifted bond, cracked metallization, poor intermetallic etc. NSOP – non-stick on pad is a defect in wire bonding which can affect front end assembly yields. In this condition, the imprint of the bond is left on the bond pad without the wire being attached. NSOP failures are costly as the entire device is rejected if there is one such failure on any bond pad. The paper presents some of the failure modes observed and the efforts to address NSOP reduction

Peregrine Semiconductor

Express Newsletter: black dots on gold finger (144)

Partner Websites: black dots on gold finger (13)

Clariant Brochure Sales Range 202003 EN.pdf

| https://www.clariant.com/-/media/Files/Business-Units/Pigments/Clariant-Brochure-Sales-Range-202003-EN.pdf

with good solubility in alcohols and ketones SAVINYL BLACK RLSN 01 S. Bl. 27 Azo 1:2 Cr-complex 7 Standard black with good solubility in ketones 1 The fastness properties were tested according to DIN ISO 12040 on a print containing 5 % Savinyl dye in

Dispense System User Guide

GPD Global | https://www.gpd-global.com/co_website/pdf/doc/Dispense-System-User-Guide-22100079K.pdf

switches: To disconnect all power to the machine, turn off the main power switch on the rear panel. Power On/Off controls Power ON (green) Power OFF (black) Main Power Switch 5/18/18 Dispense System User Guide 3.5 GPD Global© User Interface: Controls DS

GPD Global


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