Full Site - : copper fiducial on hasl finish (Page 1 of 2)

Re: Detecting lifted leads on QFPs

Electronics Forum | Fri May 28 16:30:39 EDT 1999 | JohnW

| Yes l know this problem keeps cropping up on the forum but l've missed some of the follow-ups. | | Our problem is that the lifting only occurs on 3% of production so actually detecting an improvement is difficult. We're actually having to inspect

Re: silver finishes on pcbs

Electronics Forum | Thu Dec 14 10:14:04 EST 2000 | PeteB

Jacqueline, Asuming you mean immersion silver: Advantages - Very flat finish compared to HASL, more easily solderable than bare copper with OSP and more process tolerant than this in our experience, reasonable shelf life, cheaper than immersion gol

Re: Tin-Lead thickness on PWB's

Electronics Forum | Thu May 21 09:54:07 EDT 1998 | Justin Medernach

| I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered and solde

Re: Tin-Lead thickness on PWB's/Let's Hear More

Electronics Forum | Tue May 26 14:50:07 EDT 1998 | Dave F

| | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered and sol

Re: Tin-Lead thickness on PWB's/Let's Hear More

Electronics Forum | Tue May 26 20:18:09 EDT 1998 | Justin Medernach

| | | | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered and

Re: Tin-Lead thickness on PWB's/Let's Hear More

Electronics Forum | Wed May 27 21:05:30 EDT 1998 | Steve Gregory

Hey yooze guys! Enough of the jokes between you and Earl (GRIN), let's get back to the topic...well, okay... you can tell a few more...(but good ones, 'kay?) Anyhoo...I'm not sure if ya'll are on the IPC Technet list or not, I've not seen any posts f

Re: Tin-Lead thickness on PWB's/Let's Hear More

Electronics Forum | Tue May 26 21:27:33 EDT 1998 | Earl Moon

| | | | | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered a

Re: Tin-Lead thickness on PWB's/Let's Hear More

Electronics Forum | Wed May 27 11:19:34 EDT 1998 | Earl Moon

| | | | | | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered

Re: Tin-Lead thickness on PWB's/Let's Hear More

Electronics Forum | Thu May 28 07:25:58 EDT 1998 | Earl Moon

| Hey yooze guys! | Enough of the jokes between you and Earl (GRIN), let's get back to the topic...well, okay... you can tell a few more...(but good ones, 'kay?) | Anyhoo...I'm not sure if ya'll are on the IPC Technet list or not, I've not seen any p

Re: Tin-Lead thickness on PWB's/Let's Hear More

Electronics Forum | Thu May 28 05:43:33 EDT 1998 | Earl Moon

| Hey yooze guys! | Enough of the jokes between you and Earl (GRIN), let's get back to the topic...well, okay... you can tell a few more...(but good ones, 'kay?) | Anyhoo...I'm not sure if ya'll are on the IPC Technet list or not, I've not seen any p


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