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Equipments required for making SMD PCB's

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#59130

Equipments required for making SMD PCB's | 25 June, 2009

Hi, I want to make a small setup for manufacturing PCB's based on SMD's for (pototyping boards, etc). I don't know clearly what are the equipments required for this purpose. I have an idea that we have to use (Pick n place station, Screen printing system, Solder Paste Screen Printing, Preheat system and oven). Can anyone give me some details what equipments are required and which company is best for equipments. Thanks .

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#59136

Equipments required for making SMD PCB's | 27 June, 2009

Hi,

This is easy. If your just doing prototypes, then you could get by with a syringe of solder paste and a hear gun. You can put down a little solder paste on each page and then place the passives and heat gun the board.

If you have other active parts, you can use of those wave soldering iron bits and solder these. However if your doing BGA, then this is a little more tricky, but just flux the pads and heat gun them down gently. However you would need to do the BGA's before the passives as the BGA needs more heat and should not be done at the same time as the passives.

In the early days we assembled dozens of prototypes this way, and they all worked.

However if you want something more robust, then I suggest a small convection batch oven, and a manual stencil printer. You can load the stencil and then print the board, and the batch oven will solder. This leaves what machine you select to load the board. I once owned a MYDATA TP-9 machine. It was slow, but it worked well, and you can get them very low cost second hand. The feeders on this machine are the same as the later machines use, so you can get them cheap as well.

This should be a low cost and solid setup. We used double sided tape to hold the boards in place on the stencil printer. The batch convection oven was a little tricky to setup, and the biggest issue was it took a long time to cool down after a board. However it had a window in the lid so we could count the seconds in reflow, and then the board sat on a wire mesh matt, so we very carefully lifted the mesh matt out of the oven, and getting the board out of the oven let it cool down nice and fast, and stopped it getting burnt.

We made hundreds of boards that way, and it worked well. MYDATA's are easy to setup and you can use the vision to program the position of each component. This setup would be very easy to use and quite low cost.

Good luck!

Grant

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#59138

Equipments required for making SMD PCB's | 27 June, 2009

I'm not in assembly, but I do know of a technology called Sipad if you are only looking to do small batches. They pre-apply the solderpaste to boards with a light adhesive, which allows you to hand-place components, even micro BGA's and fine-pitch QFP's. Then all you have to do is run them through a reflow, without needing a screen printer or stencil. Their site is http://www.sipad.com if you want to check them out.

Yash

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#59139

Equipments required for making SMD PCB's | 27 June, 2009

Hi,

That's an interesting idea, and should work well. Has anyone used this process before? If you were careful, you could even reflow the board with a heat gun, but at the very least, you would only need a simple batch reflow oven.

Someone should make a low cost machine that does this to standard boards.

Grant

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#59145

Equipments required for making SMD PCB's | 29 June, 2009

Here on SMTnet, we've talked about using toaster ovens to reflow solder paste previously. Search the fine SMTnet Archives for more.

Here's a clip from one of those threads: Look here: http://www.pcbexpress.com/stencils/stencil_article_page1.htm

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#59150

Equipments required for making SMD PCB's | 30 June, 2009

I can tell you all about SIPAD ssd if you contact me off line or send me your information.

Matt Kehoe Owner SIPAD Systems Inc. 770-475-4576

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#59155

Equipments required for making SMD PCB's | 30 June, 2009

sipad does work we used it on one assy it had a very fine pitch part on it and at that time our dek 260 wasn't up to the task along with our 8 mil stencils. we had no problems with it it was sticky enough to hold the parts on thur all smt machines. the paste is right on the pads and is flattend out so parts sit on the board level and in the sticky flux.

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#59158

Equipments required for making SMD PCB's | 30 June, 2009

Here is a movie of a SIPAD ssd board reflowing in a $70.00 convection toaster oven.

http://www.sipad.com/download/SIPAD.wmv

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