Full Site - : excess solder on qfn (Page 8 of 11)

Differentdefect on circuit board surface

Electronics Forum | Fri Jul 10 07:34:00 EDT 2020 | elijah

From the poor bonding strength of the board, the surface quality problems of the board are divided into: 1. The cleanliness of the board surface; 2. The problem of micro graphite (or surface energy) on the surface. PCB circuit board proofing Youke bo

flux on PCB's after cleaning

Electronics Forum | Fri Jul 23 14:41:41 EDT 2004 | Steve Stach

Dear JSK, It sounds like the root causes of your problem are two fold. First, excessive heat will polymerize the abietic acid found in rosin forming neo-abietic diamers and polymers which are much less soluble than the parent monomer. There are

How much voiding to allow on QFN's

Electronics Forum | Tue Jan 12 15:29:40 EST 2010 | davef

What is your concern regarding voiding in QFN solder connections?

Excess wave flux on lead free process

Electronics Forum | Thu Mar 17 03:07:17 EST 2005 | Chua

Hi, We are running lead free at wave solder now and the spray flux system is down. If we are going to able the flux manually, what problem will we be facing with the excess flux able. Appreciate for the advise.

RoHS Compliance of Chormium coating on connectors

Electronics Forum | Fri Dec 03 15:56:47 EST 2004 | Indy

Hi Everyone, Could someone please tell me - What happens if a N-type connector having chromate coating over silver plating is hand soldering to a PCB. Does the Chromate coating form a compound with silver, Or does it come off while cleaning excess


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