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QFN shape on Fuji Flexa for CP6

Views: 2363

#61957

QFN shape on Fuji Flexa for CP6 | 27 May, 2010

Hi.

I'm trying to develop a shape to place a QFN at a CP6, I'm using FujiFlexa. We have never had a shape for this particular component, we only draw as a rectangle and put a rectangle vision No (10 in this case) but we're scarifying accuracy. is the same procedure than BGA shapes? Do I have to put Vision No 230 and declare elements with p_pattern 2 with Inspect whitout width (Result 9). Also I don't know if I could use front lighting for CP6 and which type of lighting use (front A, front B, frontAB.. etc).

We have never placed BGAs before but I get this information from FujiFlexa Helper.

Any help will be greatly apreciated.

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aj

#61977

QFN shape on Fuji Flexa for CP6 | 31 May, 2010

Hi Manuel,

Do you not have a fine pitch placer?if not may be you need to slow down the placement speed on the QFN - I would imagine you would get a lot of fails trying to use the vision to pick up the component lands. We place thousands of QFNs and I place them using Vision 10 with no problems on the FIP3, I have placed them on the CP6 aswell and no issues.

AJ...

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#61979

QFN shape on Fuji Flexa for CP6 | 31 May, 2010

I think placing QFN in CP6 will be no problem....

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#62036

QFN shape on Fuji Flexa for CP6 | 10 June, 2010

Hi Manuel,

We've been placing QFN's with our CP6's for a long time now. We use vision type 10 just like you describe. I wouldn't bother with front lighting & trying to pick up the leads. Inspecting the leads doesn't provide better accuracy. I would just make sure you place them last, with a slower cam speed. If you're placing accuracy is poor when placing the QFN's, I would think you have another issue. Placing too fast? incorrect nozzle size? Incorrect part height?

-Dax

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#62037

QFN shape on Fuji Flexa for CP6 | 10 June, 2010

Thanks for the replies!!

We reduced the speed as you commented and yes, the accuracy improved considerably.

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