Electronics Forum | Wed Oct 21 08:06:06 EDT 2009 | scottp
I agree with Dave. If the device has a lot of power we'll put thermal vias between the solder deposits with annular rings of soldermask to keep solder out of the holes. We've never had to mess with placement pressure. We've been using QFNs for yea
Electronics Forum | Sat Jun 17 08:57:23 EDT 2000 | Chrys Shea
A few more tricks to try: - Got a hot air rework machine? You can get more controlled heat on the area and lower the risk of damage to the fab. I never got topside fillets un unrelieve ground planes until I went to convection preheat on my waves.
Electronics Forum | Fri Jun 16 11:08:30 EDT 2000 | Travis Slaughter
Did you try preheating the board then hand solder? Those little heat shrink guns work great for this.
Electronics Forum | Fri Jun 16 11:28:53 EDT 2000 | Boca
Solder 'follows' heat. 1. Preheating is a great idea, use a baking oven to get the whole assembly up to temperature, use the preheaters in your wave solder machine (without wave) to preheat the assemblies ... 2. Or use the biggest soldering iron
Electronics Forum | Mon Jun 19 19:08:21 EDT 2000 | Brian W.
IPC-610 Rev B: Paragraph 4.1 (page 52), As an exception to fil requirements on Table 4-1 on thermal heat sink planes plated through holes, a 50% vertical fill of solder is permitted, but with solder extending 360 degrees around the lead with 100% wet
Electronics Forum | Tue Nov 15 15:37:05 EST 2011 | comatose
I have a new (to me) Vitronics XPM3 oven which we're hooking up. It requires 480V, and I only have real 208V in the facility. I have a transformered up 480 subsystem, but its corner grounded rather than center grounded. The XPM3 manual suggests tha
Electronics Forum | Thu Apr 20 17:28:32 EDT 2006 | GS
The simple way should be to wire the ground according to your National Safety Standards. Regards........GS
Electronics Forum | Thu Nov 16 23:05:40 EST 2017 | slah6678
What is the IPC Spec for Golden Ground Pad Contamination with Solder ? Especially for Automotive product.
Electronics Forum | Tue May 23 16:56:10 EDT 2000 | Ashok Dhawan
For grounding Table Mats/ Floor Mats and workstations, does grounding resistor need special characterstics e.g Wattage, material of construction, etc. We intend to use 1M Ohms resistor. EIA-625 does refer to EOS/ESD-S6.1 standard ( paragraph 7) fo
Electronics Forum | Tue Jul 30 21:44:13 EDT 2002 | sohct
Hi Anyone has experience in manufacturing RF PCB and encounter voids on the grounding pads? The grounding pad is covered by the a big component. Question is does voids in the solder joint affect the RF operation?
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