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Category:PCB PCB Pad

Group Administrators: 1 | Group Member: 20 | 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 Post A Thread
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PCB pads introduction

Pad is the basic constituent elements of the surface mount assembly used to form the land pattern of the circuit board, that is, various combinations of pads designed for special component types. Ther...(view more)

Sergio Vasconcelos
2017/5/22 16:56:42
1 comments
566 views

Wire to SMT pads

Hi All, Has anyone seen or used equipment that is capable of automating the process of attaching hookup wire directly to a large SMT pad? Soldering, ultrasonic? I'm looking to see if...(view more)

tony
2017/5/6 11:43:23
1 comments
552 views

IPC for pad spacing reduction

Does the conductor spacing requirement in IPC-600G apply to pads? Does it include the nickel/gold finish or only the underlying copper?(view more)

Brian
2017/5/2 10:14:39
4 comments
603 views

ENIG-BLACK PAD

It is very common to relate ENIG pad surface finishing with BLACK PAD defect. However, is anyone know why BLACK PAD defect only happen on fine pitch pad areas such as BGA, QFP? Why this defect did not...(view more)

Daniel
2017/2/27 22:40:55
5 comments
533 views

Bare Copper Pad Reflow Soldering

I received a request from customer to assemble ceramic substrate (alumina oxide)that printed with a low temperature Copper thick film conductor (the overglaze layer is polymer). The Copper pads are ex...(view more)

tom
2017/2/27 7:06:38
5 comments
594 views

PCB Pad lifted - repair

Hi All, I am producing a lot of high cost PCBA where the PCB material is the `ROGER' material. Due to some of the high components and handling we get pad lifted issues sometimes and as of now ar...(view more)

xilinliu
2017/2/27 4:14:49
4 comments
664 views

Micro Vias in Pads

Anyone have an idea how small a via must be to inhibit significant solder volume escaping into the via?(view more)

cec021
2017/2/26 8:18:46
1 comments
967 views

The Discussion of the New PADS Family

Mentor Graphics just announced three new PADS family products for PCB design that, according to the company, start at unprecedented pricing for the independent hardware engineer, delivering affordable...(view more)

Gabe
2017/2/8 23:32:22
1 comments
1187 views

PADS and PCB Design

PADS is a PCB design package developed by Mentor Graphics. It comes in three trim levels (Standard, Standard Plus and Professional), and is considered as a high end commercial grade software package. ...(view more)

Brook
2017/2/7 1:25:06
4 comments
456 views

Gold Pads Soldering problem

Not all but some new boards we have had solder joint problems, for example some of the pads refuse to solder at all and the solder paste ends up attached only to the leg, reworking makes no difference...(view more)

n0xas
2017/2/2 22:11:19

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