Mark McMeen
VP Engineering Services
STI Electronics Inc.
Mark T. McMeen is STI Electronics Inc.ʼs Vice President of Engineering Services. He oversees the daily operations of the Engineering Services division of STI. He has over 18 years experience in the manufacturing and engineering of PCBs.
Mark McMeen has submitted responses to the following questions.
Cleanliness Testing
I would recommend using an ion chromatography approach to quantify and qualify the amount of ionic contamination present on the ...
Type 4 Solder Ball Use
There is no downside to using type 4 paste. You will get a larger metal content due to metal load ...
Mixed Technology - Which First
We always smt first and then thru hole for repeatability due to thru hole component size issues. SMT components are ...
Organic Flux Residue Concerns
The answer lies in what type of organic residue is left.
My recommendation is to have an ion chromtagraghy analysis ...
Delamination dilemma
Please review your bake out time and temperature for your bare boards. Rule of thumb is 105C for 6 hours ...
Cutting inner layer circuits
Please insure all technicians are trained to the 7711 / 7721 rework standard and have proper certification training. The drills ...
Wave solder process issue
Dewetted / unwetted solder is a sign that the solder alloy does not like the surface of the pads in ...
BGA Replacement limit
There is no hard industry rule but the rule of thumb for most companies is no more than 5 to ...
Lead frame contamination
The answer is really a 2 part solution to this request. First, Lead frames need to be free from all ...
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