Electronics Forum: qfp polarity smd (Page 1 of 6)

Re: Who Are The X-Men?

Electronics Forum | Sat Oct 17 10:43:29 EDT 1998 | smd

| Sorry folks. I'm just a naysayer here. Let's look at this BGA thing...... | | We've all been successfully processing down to 16 mil FP stuff for years, now--some of us down to 11 mil. Once the printing process was stabilized, paste rheologies were

BGA and QFP orientation in trays for pick and place

Electronics Forum | Wed Jan 14 14:58:21 EST 2004 | Gilroy Misquita

I would like to know if there is an International standard for BGA and QFP polarity in trays for pick and place. How are these components placed on trays and is there a polarity of the tray itself? Please feel free to send me an email or reply on t

BGA and QFP orientation in trays for pick and place

Electronics Forum | Thu Jan 15 12:55:03 EST 2004 | James

Polarity in tape and reel is usually always on the bottom left side. And that is correct for the trays, they have a corner taken out where the polarity goes. Hope that helps........

ARE ARE ANY REASION IN DELAMINATION OF SMD (QFP)EXCEPT HUMIDITY

Electronics Forum | Fri Aug 18 20:42:02 EDT 2000 | KYUNG SAM PARK

Hi. Smtguys I need help. The delamination of smd (QFP) occured when we checked with the SEM. This device have been excursed smt process after baking for 24 hour (125��) in oven. Are there any other reasion in SMD delamination except humidit

Matrix Trays

Electronics Forum | Mon Aug 22 09:57:46 EDT 2005 | gavinscott

Hi All, The method that I use when training operators is.. a visual aid that shows the operators what way the trays are placed into the machine and the polarity of the component and also the component change logs. The matrix trays that I have delt w

programming SMD flash memory and SMD flash memory in microcontrollers before PCB assembly

Electronics Forum | Fri Jan 15 05:33:05 EST 2016 | jvercamm

hi, I would like to know if SMD parts (soic, small qfp, large qfp and tsop parts) can be programmed before PCB assembly and, if true, which companies can do this. These parts are either embedded microcontrollers with flash memory, flash memory and

SMD adhesive

Electronics Forum | Mon Aug 29 18:14:20 EDT 2005 | OverTheHill

Good day, We use Loctite 3616 for securing SMD's to the PCB before wave. On rare occasions, we have to remove and replace the secured part. Our operators are having a diffucult time removing parts (large QFP's, etc). My questions to this forum: 1)

Flat ribbon lead ?

Electronics Forum | Wed Nov 29 23:17:37 EST 2006 | raychamp007

Dear Friend, SMD E-cap wasn't a Flat ribbon, L or gull wing. Pls. look at SOIC & QFP for Flat ribbon, L or gull wing. So far IPC had confirmed dont have any criteria set specific for SMD E-cap.

Re: footprint formula

Electronics Forum | Fri Mar 03 06:41:09 EST 2000 | jacqueline coia

I have tried the IPC calculator and they do not have this type of component registered. When trying to select 'other' on menu, no connection can be made. The polarity if the QFP has not been decided yet (pre-PCB design) the pitch size of the componen

Re: footprint formula

Electronics Forum | Fri Mar 03 06:41:09 EST 2000 | jacqueline coia

I have tried the IPC calculator and they do not have this type of component registered. When trying to select 'other' on menu, no connection can be made. The polarity if the QFP has not been decided yet (pre-PCB design) the pitch size of the componen

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