Electronics Forum: 0.4mm (Page 1 of 13)

PQFP with pitch of 0.4 mm

Electronics Forum | Tue Jan 30 07:55:31 EST 2001 | ibi

I will have to process a PQFP 128 with a pitch of 0.4 mm. Given that the width of its leads are about 0.13-0.23 mm, i dread the worst when printing the solder paste. So, i would like to know if some people have yet test this type of fine pitch, what

PQFP with pitch of 0.4 mm

Electronics Forum | Tue Jan 30 15:30:17 EST 2001 | dason_c

Please check what is the actual pitch size. I found some of the designer use 15.7 mil pitch and no accumulate ie 15.7, 15.7 and 15.8...... Also, I recommended the pad width should be 10 - 11 mil for 0.4mm pitch. You can open the 10 - 10.5 mil aper

PQFP with pitch of 0.4 mm

Electronics Forum | Sat Feb 10 18:33:52 EST 2001 | arturoflores

check the archives (keyword="16 mil pitch") and also consider 45 degree pattern printing. Regards.

PQFP with pitch of 0.4 mm

Electronics Forum | Tue Jan 30 21:14:26 EST 2001 | davef

Suggestions are: * Limit pad width to 0.008" [0.2mm] * Use IPC-7525 Stencil Design Guidelines * Avoid Type 4 pastes, if you can * Slow down your print head to 0.63"/sec [16 mm/sec] * Consider the suggestions on printing by rpereira in the past

PQFP with pitch of 0.4 mm

Electronics Forum | Sat Feb 10 17:12:03 EST 2001 | rpereira

I admit, 16 mil QFP printing is very challenging but if all your control factors (print speed, etc...) are setup correctly (through DOE) extremely high yields can be achieved and more importantly a repeatable and robust product will be manufactured.

0.4mm pitch CSP Dummy Component

Electronics Forum | Mon Mar 04 22:50:03 EST 2002 | Nell

Hi, Could anyone tell me where can I get the 0.4mm pitch CSP Dummy Component and the Test PCB? Any comments will be appreaciated. Thanks and Regards. Nell

0.4mm pitch CSP Dummy Component

Electronics Forum | Wed Mar 06 07:13:23 EST 2002 | PeteC

nope, only placed 0.75mm pitch myself. I looked around some data sheets and did not find any 0.4mm.

0.4mm pitch CSP Dummy Component

Electronics Forum | Wed Mar 06 21:20:36 EST 2002 | davef

We are aware that 0.4mm parts are coming [ http://www.kns.com/prodserv/flipchip/products/roadmap-ultracsp.PDF ], but are assembling none at the present time. We�re in no rush!!!

0.4mm pitch CSP Dummy Component

Electronics Forum | Tue Mar 05 08:13:50 EST 2002 | PeteC

Try Tessera. http://www.tessera.com

0.4mm pitch CSP Dummy Component

Electronics Forum | Tue Mar 05 22:35:49 EST 2002 | Nell

Hi Pete and Dave, I already check with Practical component, Tessera and TopLine Dummy component they said they only have up to 0.5mm pitch CSP. Anyway, thanks for your input... Do both of you know in the market right now is there any 0.4mm pitch C

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