Electronics Forum | Fri Feb 17 07:23:29 EST 2017 | sevenfortyone
I'm a PCB designer working on a board that has a rubber keypad with control buttons mounted to it. The PCB contains the corresponding contact patterns for the buttons - a typical interlocking finger pattern. In the past when I've encountered this
Electronics Forum | Fri Feb 17 09:08:22 EST 2017 | davef
An interesting paper on the topic is "The evolution of surface finishes in mobile phone applications" by Claus Würtz Nielsen at Nokia Mobile Phones R&D [http://www.cicmt.org/adv_micro/papers/Nordic2004paper.pdf] The paper reported corrosion problem
Electronics Forum | Thu Aug 31 11:16:53 EDT 2017 | hxamalia
Hello ALL Good day , it is Amalia from HX Circuit Technology Co.,Ltd in China, we are a prefessional PCB factory with many years. We are focusing on quick lead time for PCB with good service . please contact with me now ,thanks Email: amalia@hx-c
Electronics Forum | Tue Feb 21 03:20:57 EST 2017 | pcbcart
We're a custom PCB manufacturing services provider based in China and we have made many high quality circuit boards for high end products. Based on your project requirements and our years' experience, we are positive that ENIG is totally sufficient.
Electronics Forum | Tue Feb 21 01:32:49 EST 2017 | soldertraining
Looking for advice on soldering lead free paste to a board with very heavy gold plating, In my opinion, Gold contact surfaces are often used on circuit boards with membrane switches which is a choice of technology for industrial, commercial and consu
Electronics Forum | Sat Jun 09 07:59:14 EDT 2007 | davef
A keypad overlay is used to adapt one basic keypad design to a variety of applications. The overlay is positioned on top of the key board to match functions on the overlay with buttons on the keypad. The user selects a function on the by pressing t
Electronics Forum | Tue Apr 06 12:13:46 EDT 2021 | luca
Hello, does anyone know if there is an IPC standard for carbon ink? we use for keypads instead ENIG, we found batchs of PCB with 2-3ohm, 20ohm, until 300ohm( resistance of contact surface) by the same PCB supplier!
Electronics Forum | Fri Apr 27 22:16:16 EDT 2007 | the silicon horizon
www.thesiliconhorizon.com turn your toaster oven into a SMD reflow oven! this controller can be standalone with LCD and keypad, or through USB with our free software! change pid gains, profiles, program to controller, print graphs and much much mo
Electronics Forum | Tue Dec 21 04:09:49 EST 2010 | johanhuizing
0.5 and 0.4 mm pitch, we think we could get problems with the solderpaste stencil. Also some board have keypads and then we have do do partial gold and I think that will not reduce the costs
Electronics Forum | Sat May 05 05:02:53 EDT 2018 | mahendra
Dear Sir, Mam, Any X, Y & Z functionalities and keypad inputs just stop at random during operation. Sometimes it won't home. I would appreciate some assistance with subject problem above.
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