9 Threads found on edaboard.com: Back Drilling
It is a process to remove the unused section of plated through holes.
This will ensure signal stubs are minimized; Stubs are the source of impedance discontinuities and signal reflections which become more critical as data rates increase. It is preferred method in HS designs.
Allegro handles back drilling processes.
PCB Routing Schematic Layout software and Simulation :: 03.04.2008 08:28 :: majnoon :: Replies: 6 :: Views: 6041
I think did an article on pcb drilling machine a while back
go to and do a search on pcb cnc or some such
PCB Routing Schematic Layout software and Simulation :: 26.06.2003 00:12 :: bluecube :: Replies: 5 :: Views: 3314
in principle it will oscillate. From end to end and back.
but variations in the gravity field (Earth is not a singular point as in exercises!) will affect this result.
PS: Are you interested in creating a hole in the Earth. Please let us so we can try get transported somewhere else. :wink:
Mathematics and Physics :: 20.10.2004 05:50 :: the_penetrator :: Replies: 6 :: Views: 1039
Could any one please help me.i want to know before start the cad what are the rules we have to follow for back plane board. If any one having details about the back plane board documents please share here... :)
PCB Routing Schematic Layout software and Simulation :: 06.12.2010 07:39 :: geekay :: Replies: 5 :: Views: 1221
Why make AC from DC and then back again? Why not just build a new front end for the PCs original PSU? What happens in the PSU is that the AC is rectified and chopped up again to drive the pulse transformer. Rewinding the transformer for 12V will save the unnecessary step and work much more efficient.
Analog Circuit Design :: 04.09.2005 17:49 :: Ante :: Replies: 9 :: Views: 1692
A VSAT, for Very Small Aperture Terminal, is a 2-way satellite ground station with a dish antenna that is smaller than 3 meters, as compared to around 10 meters for other types of satellite dishes. VSAT is most commonly used for point of sale transactions including credit cards and RFID applications such as Mobil Speedpass. There are over 100,000 g
Digital communication :: 10.08.2006 06:35 :: mmike :: Replies: 3 :: Views: 2081
I used PCBcart in past and only remark I had was that they drilled through several boards causeing poor drilling tolerance. Otherwise, excellent boards.
BTW, I can't seem to open their webpage today. Are they down?
Never mind, they are back on.
Business, Promotions, Advertising :: 17.03.2008 16:41 :: Siniąa :: Replies: 4 :: Views: 1382
At 6.4mm then this may have been back drilled 9search this forum - its been discussed recently) hence the slight misalignment.
AFAIK you can only drill so far with a thin bit otherwise it breaks.
PCB Routing Schematic Layout software and Simulation :: 04.07.2012 13:29 :: cyberrat :: Replies: 3 :: Views: 313
here,i am using canon lbp2900b laser printer,it works for me about 2 years,result is good.
paper,i am using back paper of stickers ,which has non sticky coating.
Show your DIY :: 10.11.2012 23:04 :: matthai :: Replies: 8 :: Views: 1218