Electronics Forum | Thu May 26 16:41:00 EDT 2011 | scottp
Here's what I do: - Test Surface Insulation Resistance (we're in the high reliability market and use a test significantly harder than IPC's). I also test SIR in combination with other assembly materials like conformal coatings and wave solder flux
Electronics Forum | Wed Jul 06 15:29:01 EDT 2022 | glasscake
Also I should mention, I've ditched the formulas for getting the "optimal" solder amount after being bit by them once. Now I just design a PCB with 4-10 spots for the connector then order a stencil with a range of aperture sizes. Figure out what give
Electronics Forum | Thu Sep 11 09:59:47 EDT 2008 | rarnold
Paste stored tip down, so separation in the tube is not suspect. Remember that the defect was produced on a screen printer running with a Rheopump. A few more details are that the strip of the board containing the uncoalesced solder is consistent w
Electronics Forum | Thu Jun 30 12:21:33 EDT 2022 | kumarb
Thanks. Yes, we have attempted to use standard ROHS profiles in the past and turned our THT connectors into 'chucky dolls' after the PCBA left the oven. We then realized that we need the high temp nylon connectors to allow for the use inside the SMT
Electronics Forum | Thu Jun 30 13:07:56 EDT 2022 | emeto
I have used Bi based solder pastes before. What I can say about them is that they are brittle. Joints were cracking easily. This product is something new on the market, so it might be better. Keep in mind to test it for dropping and vibration and joi
Electronics Forum | Sat May 15 09:28:44 EDT 2010 | dekhead
I worked with a customer about 2 years ago on a process similar using ProFlow head to put paste in holes for through hole... Similar to Pin in Paste. Somewhat successful; but ran into heat related damage issue from TH components through reflow.
Electronics Forum | Wed Sep 22 14:45:01 EDT 2004 | Michelle Ogihara
As many people have participated in this email string, including competitors and customers of Sawa, I would like to respond to especially one rather detailed email expressing concerns with this stencil cleaning system. Also, this teaches me to keep
Electronics Forum | Wed Jul 06 15:26:12 EDT 2022 | glasscake
No experience with low temp solders for PIHR but we do use standard lead free 245-255 peak profiles on high temp connectors frequently. Honestly the added cost of the high temp connector pays for itself in labor. I almost always use oversized apertu
Electronics Forum | Thu Jul 21 08:27:05 EDT 2005 | grantp
Hi, Yes, that's an idea, but from my experience with MYDATA, it would fail test, and the machine would either know it's lost the component, or it would not know, and the component would not be on the pad because the machine would think it's mounted
Electronics Forum | Fri Jan 28 12:18:32 EST 2005 | Chunks
Your best bet is to do a decision making matrix. Each company has so many different criteria�s it's hard to pick out which one might be important to yours. Simply pick out your top 5 paste manufactures. Next decide what your "Eliminators" are - th
