|
Post by Dingo on Jan 14, 2006 21:27:13 GMT 10
Here my some of my tips for homebrewing PCBs when using heat transfer method:
1) Always include some ground planes or similar large areas of copper. Whether needed or not.
Reason: I've found that if they are not included, when you place the pattern on the hot copper, it might shift and pull some of the longest traces. This has happened many times to me until I tried adding big planes. Now it seems that the planes help stabilise the pattern. Well it at least has stopped my long traces nto transfering.
2) Use the cheapest paper - it seems to not bond with the ink as much as more expensive stuff.
3) After transferring, let the paper soak longer than you'd think - at least 5 minutes. It comes off more easily. Still might need a toothbrush though.
4) If you are having trouble getting the paper through the printer, pre-curl it. I know you should try an minimise curling, but it is better than no pattern at all.
More to come I'm sure......
|
|
|
Post by emzed on Aug 30, 2006 20:00:53 GMT 10
Have you tried 'press n peel'? Its a blue transfer film. Works great for me! you can get really quite fine tracks. Altronics/Aztronics sell them. Just over $30 for 5 A4 sheets. Considering the quality of the final pcb tracks and it being virtually hassle free, i think its worth it... www.altronics.com.au/index.asp?area=item&id=H0770
|
|
|
Post by Dingo on Aug 30, 2006 20:30:19 GMT 10
Yeah, I'm very interested in hearing everyone's experiences with them. I've always balked at the ostensibly high price of these sheets and the photoresist ones. Although you can get quite a few designs on an A4 sheet. NExt time I'm hitting the limit of fine traces with the glossy photopaper I'll look into these as the solution, thanks
|
|
|
Post by emzed on Aug 30, 2006 21:22:21 GMT 10
Yeah, i thought they were heaps expensive too. But if you think about it. If you get 6 boards per sheet, thats only $1 per board effectively. I just cut off a small square big enough to do the job, print the circuit on paper to check where to line up the film, then tape the film t the paper and print. Very little waste of film. So overall, not too bad once you fork out the $30.
|
|
|
Post by Dingo on Aug 31, 2006 19:12:29 GMT 10
Now that sounds like a very good idea indeed. I'm eager to try it out now, thanks.
|
|