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Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Squegge Angle for Fine pitch?

#26562

Squegge Angle for Fine pitch? | 10 December, 2003

Hello to all I need your help and support, can somebody tell me wich is the best angle for the squegge to apply solder paste 45 degrees or 60 degrees. I will apreciate your soon answer..

Regards..

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#26563

Squegge Angle for Fine pitch? | 10 December, 2003

Hello, We always use 45 degrees, but we just sell MPM screen printers. Hope this helps.

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#26567

Squegge Angle for Fine pitch? | 11 December, 2003

I have had fantastic success with 45 degrees but have never worked with 60 degrees so I can't tell you the diff.

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#26569

Squegge Angle for Fine pitch? | 11 December, 2003

Thank you very much for the information, I apreciate the support received.

Best Regards..

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#26570

Squegge Angle for Fine pitch? | 11 December, 2003

Thank you very much for the information, I apreciate the support received.

Best Regards..

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#26574

Squegge Angle for Fine pitch? | 11 December, 2003

Here is a study on printing factors study on CSP [we understand that you asked about fine pitch, but hey, it's close and FREE] http://nepp.nasa.gov/docuploads/2A524D62-7032-4C0D-BBDED6CFFC2FA07B/SMTA-I-Joint-Paste-2004.pdf

It's interesting that while they included squeegee angle in their factors, they never mentioned any effects based on the squeegee angle.

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Todd

#26604

Squegge Angle for Fine pitch? | 15 December, 2003

45 degree here also on our DEK .

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ex maintain leader

#26613

Squegge Angle for Fine pitch? | 16 December, 2003

Hi Cesar,

I' think is not soo critical, but take cre my 5Y experiences are focused mostly bad designed pcb's on outrunning project wich are transfered to eastern europe or to mini factories in austria. at wery old dek265 I see 45 degrees squeegue and at mpm I see used 60 degree to use.

what is your current problem? How is your stencil designed? what cleaning method do you use? how many is your target?

szhorvathbp@freemail.hu

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Kev

#26614

Squegge Angle for Fine pitch? | 16 December, 2003

We run with various fine pitch and BGA technologies here and use a standard 45 deg angle of squeegee blade for all. No problems found. Kev

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#26671

Squegge Angle for Fine pitch? | 18 December, 2003

Blade angle, print speed, squeegee pressure, should be used in conjenction with one another. The more parellel the blade is to the stencel the more it will tend to float over the solder and the more paste is forced thru the appature. Contrary the greater the angle the blade is from the board the more it will tend to push the paste along leaving voids on the leading side of the stencel appature. The proper head pressure, attack angle, and print speed will vary depending on the concistancy of the paste used. 45 degrees is pretty much standard for MPM printers plus or minus 5 degrees the other settings determin best print result.

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