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If the pads on the back side of the board are pulling up, it sounds like a registration problem. The hardest part of making PCBs at home (I've always found) is getting the vias to line up. I use a hand-held battery drill and angle it as I go to compensate for this problem. It's a good idea to add an extra pinhead to the board so that you can drill it first to work out how to compensate.
I've switched to using OSHpark.com (formerly dorkbot-pdx) and iteadstudio.com for making my boards.
Are you truly using a via? meaning 2 sided PCB to connect one layer to the next?I have been avoiding dual sided at all costs, and have even had a few boards where I needed to run about 5 or 6 jumpers since there was no way I could do a one sided board with all of my wires done on the PCB.I have never had this happen to me, I wonder if this is not a quality of board issue?Possibly you are heating to long when transferring the toner to the board?I always use a dremel and a 1/32 dremel bit for all of my holes to start, and then if I need them bigger, I increase to the final size.
Success!!!! I had my doubts about drilling first because of every other website saying to drill after you etch, but it worked fine. Maybe even the thing I was worried about turned out to be to the benefit because the acid ate away the roughed up copper around the drill holes leaving a nice clean hole. The resist actually worked better at centering the bit, that stuffs pretty hard! Quote from: ErikY on March 08, 2013, 02:57:20 PMAre you truly using a via? meaning 2 sided PCB to connect one layer to the next?I have been avoiding dual sided at all costs, and have even had a few boards where I needed to run about 5 or 6 jumpers since there was no way I could do a one sided board with all of my wires done on the PCB.I have never had this happen to me, I wonder if this is not a quality of board issue?Possibly you are heating to long when transferring the toner to the board?I always use a dremel and a 1/32 dremel bit for all of my holes to start, and then if I need them bigger, I increase to the final size.Actually I was confusing via and pad. It was ripping up pads. I am making double sided boards and this is my first one using IC's. I haven't had any aligning issues yet. I just hold the two magazine sheets up to bright light, I leave a bit of excess paper, align the holes, hold it tightly in place, staple paper together at different places (not on the design area of course), place the board in the sleeve again holding up to light to check placement, then iron on. You could be right on the issues of quality of board, or leaving the iron on it to long, or possibly it was even in the etch to long but I think Im gonna stick with this method now as it worked well.The only thing I had would have done different was going ahead and pushing the drill bit on through. I did half the board only going half way through then switch to the other side. I got impatient with this after awhile and switched. It worked fine.And also I learned a lot more about Eagle than I did before this problem.