Electronics Forum | Thu Aug 12 10:49:22 EDT 1999 | Ray Hare
I am currently involved with designing a pcb which will use 225 pin bga,s The problem with this design is that the components will dissipate a lot of heat and the design we have come up with is use the middle 6 or 7 rows of balls as the grounding,th
Electronics Forum | Thu Aug 12 17:15:56 EDT 1999 | Jim Blankenhorn
| I am currently involved with designing a pcb which will use 225 pin bga,s | The problem with this design is that the components will dissipate a lot of heat and the design we have come up with is | use the middle 6 or 7 rows of balls as the ground
Electronics Forum | Fri Aug 13 04:12:41 EDT 1999 | ray hare
| | I am currently involved with designing a pcb which will use 225 pin bga,s | | The problem with this design is that the components will dissipate a lot of heat and the design we have come up with is | | use the middle 6 or 7 rows of balls as the
Electronics Forum | Wed Aug 18 02:17:37 EDT 2010 | tennythomas
I heard that one can create the stacked/staggered microvias in the layers 1-2 & 2-3 and skip microvia in the layer 1-3 of 6 layer stack up, when the prepreg is between layers 1 & 2 and the other prepreg is between the layers 2 & 3. I want to know w
Electronics Forum | Mon Apr 05 17:47:21 EDT 2010 | boardhouse
Hi Deni, X-ray will not be able to see through Power and Grn planes. Your only way to find out is: 1) ask your board supplier to supply stack up used. 2) surface grind layer by layer to validate if it is correct stack up. What is making you think
Electronics Forum | Tue Feb 02 17:10:03 EST 2010 | flipit
Remember this is a 30 layer PCB. If it is built in a multi up panel, there is lots of room for error. Lets say there are 10 circuits per panel. Say you have a 10% scrap rate that happens randomly within the 10 up panel of circuits. Apply this 10%
Electronics Forum | Tue Feb 16 15:42:21 EST 2016 | sarason
When faced with a problem like this I sometimes look at competitive products and see what they have done. You may be able to get away with 4 layers if you have the space, however if it is jammed up that will not be an option. I presume that the total
Electronics Forum | Wed Mar 27 03:37:35 EDT 2019 | nick_arsi
Hi All Respected Engineers, Now a days am testing a high speed 20 layer PCB but currently the issue am facing that most of signals give KOhm or Mohm resistance with respect to GROUND as it should be infinity.We have around 7 GND planes in our PCB s
Electronics Forum | Mon Aug 18 13:46:09 EDT 2008 | realchunks
Tolerance stack up has really become an interesting issue with boards coming from China. What has usually been taken for granted has to be looked into with a fine tooth comb. Most board houses of the past would reject this - but China figures "If i
Electronics Forum | Fri Dec 12 01:06:02 EST 2003 | kenny
Dear folks; I am currently looking a PCB manufacturer who can fabricate PCB with the following specification:- Board sizes: _20000__ x _20000__ mils Thickness: 125 mils PCB material: FR4 Surface finish: 30 microinches Gold over 200 micro inches Nic
Products, services, training & consulting for the assembly, rework & repair of electronic assemblies. BGA process experts. Manufacturers Rep, Distributor & Service Provider for Seamark/Zhuomao and Shuttle Star BGA Rework Stations.
Training Provider / Manufacturer's Representative / Equipment Dealer / Broker / Auctions / Consultant / Service Provider
1750 Mitchell Ave.
Oroville, CA USA
Phone: (888) 406-2830
