Category:PCB PCB Pad

Group Administrators: 0 | Group Member: 21 | Group Threads: 20

Pad cratering is a mechanically induced fracture in the resin between copper foil and outermost layer of fiberglass of a printed circuit board (PCB). It may be within the resin or at the resin to fiberglass interface. Do you have ever problems about pcb pads? please talk here.

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Search Results: 20 Threads,2 Pages
2 answers
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Mentor Graphics Announces PADS Release

Mentor Graphics Corporation, (NASDAQ: MENT), the worldwide market and technology leader in printed circuit board (PCB) design-through-manufacturing software, announced the latest release of the PADS&r... (See More)

Gasper Skvarc Bozic
2017-02-02 20:49:09
Nelson Souto
2017-02-04 20:49:09
3 answers
115 views

Stencil Aperture Size and Copper Pad Size

What should be solder paste stencil aperture proper size in comparison with PCB copper pad for lead free technology? When designing PCB foortprints I was using solder paste pad undersize of 2.5 mils (... (See More)

mattiamanovalanza
2017-02-02 13:16:55
kasemkwang
2017-02-04 13:16:55
3 answers
97 views

How to repair broken pads

Hi folks, I hope you can help me on how to repair broken pcb pads. (See More)

lkrzywanski
2017-02-02 13:15:34
Renan Duarte
2017-02-04 13:15:34
4 answers
142 views

Through holes in SMT pads

Is anyone aware of some guidelines regarding through-hole in SMT pads? One of our designers wants to add through-hole leads in some SMT pads for an inductor. The size of the hole is 0.032 inches and t... (See More)

olah.mihaly
2017-02-02 05:06:07
julien.brasart
2017-02-04 05:06:07
4 answers
76 views

Lead Free Delta T (reflow 7 zones)

Please advice how can we reduce a delta T of 40 degres between pads with a seven zones reflow for a LF Assy. max 255 min 215 board size 3x5 inches. (See More)

izzetulus
2017-02-01 22:52:23
tony165
2017-02-03 22:52:23
5 answers
68 views

Ixidized pads

We have received in one lot PCBs with defect of not wetting properly. Pads were finished with HASL but they were matte rather then shiny (attachment). For me looks like they are oxidized. Interesting ... (See More)

Ricardo Medda
2017-02-01 19:57:50
Alessandro Cappello
2017-02-03 19:57:50
4 answers
144 views

pad cratering

hi, the last post on pad cratering dates from 2012. We have (likely similar) problems with a RoHS 783 solder ball BGA size 29x29mm^2 (organic package BT), pitch is 1mm and solder ball diam is 0.... (See More)

vampire
2017-02-01 14:48:05
g.laliberte
2017-02-03 14:48:05
3 answers
153 views

Would you accept this PCB ?

See them funky via pads ? What's your opinions ? Junk or acceptable ? Anyone know of an IPC manual that has pics and standards of defective and acceptable PCB's ? (See More)

Joshua Mulcahy
2017-02-01 07:04:40
rlb-designs
2017-02-03 07:04:40
1 answers
1389 views

Can Non-Functional Pads be Removed in PCB?

High-speed signals have been a hot topic that can't be avoided by communication industries. With the increase on amount of transmitted information and transmission speed rate, high-speed signals have ... (See More)

Chester
2017-01-28 09:52:27
pmaggi
2017-01-30 09:52:27
1 answers
59 views

Why do some pads overlap on the PCB board?

After designing my custom PCB at first time,I've found a problem suddently.Some pads overlap on the PCB and become a large pad. I wonder whether I've made a mistake or not. If not, can I assert that i... (See More)

bankroot
2016-09-10 11:43:41
Bradley
2016-09-12 11:43:41
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Search Results: 20 Threads,2 Pages