Electronics Forum | Thu Jul 18 12:05:19 EDT 2002 | yngwie
Experts, Today I received PCB in a punctured vacuum seal bag. the Humidity indicator change the colour to pink at 60%RH mark. The brd finish is Entek. Earlier our intention to get the board vacuum seal is because we want to ensure that the is no fr
Electronics Forum | Fri Aug 09 11:58:52 EDT 2002 | sam_b
Just started doing BGA rework. After the removal of the "old" component and after site cleaning/component reballing I am ready to install the component on the PCB. It is recommended to apply flux or paste to the board/component. I would appreciate m
Electronics Forum | Wed Nov 13 21:16:28 EST 2002 | Vinny
Hi All, I am producing a lot of high cost PCBA where the pCB material is the `ROGER' material. Due to some of the high components and handling we get pad lifted issues sometimes and as of now are unable to do repairs on these. Please help if anybo
Electronics Forum | Thu Nov 14 08:53:44 EST 2002 | MA/NY DDave
Hi As DaveF suggested I would contact a shop that has done repair. You should have the PCB/PWB Print and laminate information with you when you make the call. Ask the repair shops if they have continual experience with the Rogers Material you are us
Electronics Forum | Tue Nov 19 02:59:24 EST 2002 | yngwie
Hi Experts out there, pls help me with the following matters. How important is the bare PCB baking ? What is the temperature for baking @ what RH ? What would be the impact for the ENTEK finished board should the baking is really necessary ? For t
Electronics Forum | Thu Dec 05 11:36:30 EST 2002 | William Guatemala
Have you check the flux gravity lately? If not, Check the flux gravity every 6 hours to make sure proper parameters are meet. Here is a list of things that may cause your solder ball problems; Excecive heat, defective fixtures, preheating temperature
Electronics Forum | Thu Dec 05 17:40:24 EST 2002 | davef
While unfamiliar with some of the terms you use, could this be what you seek? http://www.pcbstandards.com/downloads/Metric%20Environment/General%20Documentation/PCB%20Design/PCB%20Design%20Routing/Metric%20BGA%20Routing.pdf Stepping backwards just
Electronics Forum | Thu Dec 19 20:03:27 EST 2002 | edmentzer
Does any one have any experince with heatsinking a 240 lead QFP such as the Lattice Orca to the PCB? I have a customer who would like to know how this might be done. We are thinking of using some solder paste under the center of the part, or using
Electronics Forum | Sun Jan 19 10:45:04 EST 2003 | davef
For laminated FR4 PCB, we bake between 6 and 24 hours at 100�C. [Search for other bake recipes in the fine SMTnet Archives.] Alot of the determination of baking time is a function of: * Amount of moisture absorbed. * Amount of moisture you need to r
Electronics Forum | Fri Feb 07 15:17:14 EST 2003 | MA/NY DDave
Hi I am pretty sure it isn't the pad that is causing the problem. To me it seems like those via holes through the pcb either to an internal plane or to the other side. I can imagine creating an interesting stencil to accomodate the vias yet you are
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