Category:PCB Assembly PCB Assembly Service

Group Administrators: 0 | Group Member: 250 | Group Threads: 390

In assembly the bare board is populated with electronic components, called a "printed circuit board assembly" (PCBA). In through-hole technology, the component leads are inserted in holes surrounded by conductive pads; In surface-mount technology (SMT), the component is placed on the PCB so that the pins line up with the conductive pads or lands on the surfaces of the PCB.

Post A Thread
Search Results: 390 Threads,39 Pages
4 answers
282 views

Solder under bottomside SMT components

Has anyone seen a problem with solder under chip components, in-between the glue and the component or in-between the mask and the component? We seen both. What could be causing this? This has only bee... (See More)

jarmoblo
2017-02-27 14:50:10
ilmandorlone
2017-03-01 14:50:10
4 answers
206 views

SMT - Cpk for Attribute Data

Is it possible to find the Cpk value for attribute data? We are running into problems due to unspecified LSL/USL values. How can we find the Cpk values without specific LSL/USL? We would also like to ... (See More)

Chip
2017-02-27 12:09:30
Giovanni Pelliccioni
2017-03-01 12:09:30
5 answers
272 views

solder dross recovery

Does anyone have any information on inhouse recovery systems for the removal of lead from the dross. There was an article in the march issue of SMT magazine. The web site it directed me to go to is no... (See More)

Josh
2017-02-27 06:18:03
Eibert Draisma
2017-03-01 06:18:03
5 answers
331 views

Terminology

Where is Fugi programing used in a SMT operation and where could I go to find out more about it? (See More)

rkrten1
2017-02-27 05:44:08
Carlos Mourato
2017-03-01 05:44:08
5 answers
297 views

Screen Printing

I have a PCB that requires me to use a pallet for support. I was wondering if anyone out there is currently doing this. My biggest concern is screen printing. I think I know how to handle it - but jus... (See More)

Cleber Toss Hoffmann
2017-02-27 04:13:57
Blair
2017-03-01 04:13:57
1 answers
318 views

To populate a surface mount PCB

Let’s face it friends, everything is moving toward surface mount components. We’ve seen quite a few features here that cover using stencils to populate boards and using ovens to reflow. [Oleg] has put... (See More)

miika.kirves
2017-02-26 18:49:27
Antonio Semeraro
2017-02-28 18:49:27
3 answers
178 views

New SMT Equipment

The company I work for is looking to install a new SMT line. We currently use Assembleon equipment but we are also looking at Sony. I have not seen any information on how well Sony machines perform. I... (See More)

2B labs
2017-02-26 18:07:31
charlene
2017-03-12 06:44:35
1 answers
278 views

prevent COB pad from contamination

Hi, During SMT process, i found that solder splash on the gold pad. The distance between the COB pad with component pad is about 1.25mm. My question is what material can used to cover the COB pa... (See More)

akira
2017-02-25 23:16:14
Achim Paulduro
2017-02-27 23:16:14
1 answers
200 views

Reflow Profile Design

Hi, This is a little embarrassing asking this question, as I think I am profiling our oven incorrectly. I have been using the profile based on the solder paste specification, however we ha... (See More)

Pierre Mainardi
2017-02-25 22:58:06
jongerde
2017-02-27 22:58:06
1 answers
272 views

what may be causing reflow issues with QFN?

QFN assembled on a PCB indicates paramteric fails when tested. When the QFN on PCB is reflowed a second time, it recovers and passes testing. Visual, X-ray inspection revealed no anomalies. Cross-sect... (See More)

yesyes
2017-02-25 22:54:11
Cleber Toss Hoffmann
2017-02-27 22:54:11
Post A Thread
Search Results: 390 Threads,39 Pages