Electronics Forum | Thu Aug 05 13:23:10 EDT 1999 | JS
| I am currently in the process of setting up an SMD Parts Package Database. The database will contain dimensional information to be used by the placement machinery to process parts (I.E Package Type, # of Leads, Lead dimensions, Lead pitch(s), etc.
Electronics Forum | Wed Aug 04 16:55:32 EDT 1999 | Doug
| We are installing a new reflow oven and I have been told that we do not need to vent the exhaust out through the roof since we have a false ceiling. All that is required is to vent above the false ceiling and that the air exchange is great enough t
Electronics Forum | Fri Jul 30 11:16:55 EDT 1999 | DLKearns
| I have been asked to supply a maximum shelf life for our assemblied PCB's. I realise this is dependent on so many factors- temperature, humidity, no of layers etc. But does anyone have a formulae for calculating shelf life, or does anyone know of a
Electronics Forum | Tue Jul 27 14:04:38 EDT 1999 | JohnW
| Looking for solder paste specification limits which have reliability data to support them. Currently, we are looking to define the min/max volume necessary to ensure a good joint on CBGA, PBGA, and Micro-BGA's. Any information will be greatly app
Electronics Forum | Tue Jul 27 15:56:20 EDT 1999 | Dave F
| | Just go look at the thread on stencil cleaners started by Scott Davies in the March 1-15, 1999 achives if you want to see some juicy stuff...then make your mind up about vendor inputs. Pretty obvious if you ask me... | | | | -Steve Gregory- | |
Electronics Forum | Mon Jul 26 17:04:14 EDT 1999 | JohnW
| | | | Despite the goodness of Dave F. and George Verboven, I was unable to find the damned single pin connector. As a last attempt, I've draw it (see the link) | | | | If somebody knows where can buy it, please help me | | | | (and sorry for to
Electronics Forum | Fri Jul 09 19:35:05 EDT 1999 | Earl Moon
| Hi Carol- | What you are asking for can be done. Variables you must account for include the paste viscosity, dispensing head speed, dispenser height relative to board surface, and needle size. You can use most any semi-automated system such as Ca
Electronics Forum | Wed Jul 07 14:14:03 EDT 1999 | Dave F
| Is anyone aware of some guidelines regarding through-hole in SMT pads? One of our designers wants to add through-hole leads in some SMT pads for an inductor. The size of the hole is 0.032 inches and takes-up approximately 25% of the pad area. Th
Electronics Forum | Thu Jul 08 12:33:52 EDT 1999 | Mike Demos
Thank you all for your replies. Thanks to your replies and backup from the IPC-SM-782A (section 3.6.3.2) and James Blankenhorn's "SMT Design Rules & Standards," the designer has agreed to provide adequate clearance between the via and the pad. I wi
Electronics Forum | Tue Jul 06 12:45:28 EDT 1999 | JohnW
| I've heard that use of VOC free flux with wavesolder fixtures can be challenging due to entrapment of water in the fixture. | | Is anyone out there successfully running VOC free with wave fixtures & did you experience problems? If so, how did you
