I am assembling a 16 pin, thru hole connector to a flex circuit and I am having trouble meeting the customer's 
required MINIMUM fillet height on the corner pins. The customer requires a solder fillet height of at least 
50% of the exposed pin on the four corner pins ( exposed pin is about 0.045" ). I am currently using benchtop 
wavesoldering machines with custom fixturing for this process and have also tried an automated wavesolder 
machine (Electrovert). In either case, I have not been able to tweak the process to consistently produce a 
50%+ solder fillet height on the corner pins. The only consistent process we have proven to do this is a 
manual solder add which is cost prohibitive.

I have experimented with most of the obvious parameters ( solder temp, speed, orientation, fixture geometry, 
flux, etc.) but have yet to find any major levers to pull to achieve the customer's specification. I am 
relatively new to soldering applications so I'm guessing there are some other parameters that I am 
overlooking. Does anybody have any recommendations on what to try next? 

_____________________________________________________________
||     Rick Billings                  | PEMSTAR, Inc         |
||     Internet: [log in to unmask] | 2535 Highway 14 West |
||     Phone:    (507)280-2386        | Rochester, MN 55901  |
||     FAX:      (507)288-6071                               |
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