Electronics Forum: pcb and coplanarity (Page 1 of 57)

Re: BGA coplanarity

Electronics Forum | Wed Jan 03 12:33:37 EST 2001 | Terry Burnette

John, There is one process issue that occurs with the larger BGA packages which have coplanarity near the high end of the .2mm spec.. The defect is commonly referred to as "ball in cup" and "head in pillow". It is an open solder connection whereby th

pcb purchasing and pcb assembly

Electronics Forum | Thu Mar 19 12:26:10 EDT 2020 | yuaanliie

You have mostly set in your mind before purchasing PCB i.e. PCB is an acronym for the printed circuit board. Last month I purchased PCB from Great PCB.

pcb purchasing and pcb assembly

Electronics Forum | Wed Mar 11 04:05:02 EDT 2020 | floravictor

Due to the impact of the epidemic, will everyone's purchases be affected? We are pcb factory in Shenzhen, we are already back to work. skype: qjthomasxiao

seperation of soldermask and pcb

Electronics Forum | Tue Mar 18 11:53:58 EDT 2014 | sara_pcb

Our contract manufacturing agency have procured pcbs from approved vendor. After assembly we found solder mask separated from the PCB on the epoxy area as patches. The top side is intact. also over the pcb tracks, the mask got damaged. In what c

seperation of soldermask and pcb

Electronics Forum | Tue Mar 25 11:25:18 EDT 2014 | horchak

The first impression I get is that the mask was applied over dirty or contaminated copper. What is the trace and land finish on the PCB? You also appear to have a wetting problem.

seperation of soldermask and pcb

Electronics Forum | Tue Mar 25 09:35:28 EDT 2014 | emeto

Have you tried to bake the boards before you process them?

seperation of soldermask and pcb

Electronics Forum | Tue Mar 25 10:31:05 EDT 2014 | sara_pcb

The boards are baked for 2 hours at 120 deg C Regards, R.Saravanan

Desiccants and pcb finish degradation?

Electronics Forum | Tue May 15 15:15:53 EDT 2001 | ohboy

Hi all, I just discovered this forum and I'm very impressed. We have a vendor who recently stopped placing desiccants in the vacuum packaging for our pcbs. (Yes, it's on the dwg!) His reasoning was that the desiccants can degrade the finish on the

seperation of soldermask and pcb

Electronics Forum | Tue Mar 25 13:55:05 EDT 2014 | horchak

Ok lets put it this way. If the PCB house used a high quality mask and properly applied it to a properly cleaned surface and properly cured it, then as Dave stated above there are only two things that can destroy it. Excessive heat and overly aggress

seperation of soldermask and pcb

Electronics Forum | Tue Mar 25 08:29:33 EDT 2014 | sara_pcb

Please refer the attached jpegs, The problem is noticed after reflow soldering followed by conventional through hole soldering. Flux used one is MIL Std. Brush cleaning in IPA is followed after each soldering step. regards, R.Saravanan

  1 2 3 4 5 6 7 8 9 10 Next

pcb and coplanarity searches for Companies, Equipment, Machines, Suppliers & Information

Precision PCB Services, Inc
Precision PCB Services, Inc

Products, services, training & consulting for the assembly, rework & repair of electronic assemblies. BGA process experts. Manufacturers Rep, Distributor & Service Provider for Seamark/Zhuomao and Shuttle Star BGA Rework Stations.

Training Provider / Manufacturer's Representative / Equipment Dealer / Broker / Auctions / Consultant / Service Provider

1750 Mitchell Ave.
Oroville, CA USA

Phone: (888) 406-2830

Win Source Online Electronic parts

Smt Feeder repair service centers in Europe, North, South America
Circuit Board, PCB Assembly & electronics manufacturing service provider

Wave Soldering 101 Training Course
Software for SMT

High Precision Fluid Dispensers
Thermal Interface Material Dispensing

High Throughput Reflow Oven
Assembly Automation Technology

SMT & PCB Equipment - MPM, DEK, Heller, Europlacer and more...