Project:PCB Making: Difference between revisions
From London Hackspace Wiki
→Meurig - 04-Aug-2010
(→Notes) |
|||
| Line 169: | Line 169: | ||
* Etching time: This took a while, went much faster if I was agitating the solution. Somewhere between 20 and 40 minutes (I was having dinner so didn't really keep track). Heating the solution might speed this up but I wouldn't really want to put in the microwave. | * Etching time: This took a while, went much faster if I was agitating the solution. Somewhere between 20 and 40 minutes (I was having dinner so didn't really keep track). Heating the solution might speed this up but I wouldn't really want to put in the microwave. | ||
* Removing exceess photoresist: I hadn't read the thing above about white spirit so I just exposed the whole board again (without laminate) for about a minute and ran it through the developer again, worked well but I'll try white spirit next time. | * Removing exceess photoresist: I hadn't read the thing above about white spirit so I just exposed the whole board again (without laminate) for about a minute and ran it through the developer again, worked well but I'll try white spirit next time. | ||
Meths is also good, and less oily & smelly than WS. You need to leave it on for a min or so, then wipe off with paper towel. | |||
* Protective layer: I just covered the whole board with a flux pen (donated by <strike>Adrian</strike>Farnell, left by the box of sharpies). | * Protective layer: I just covered the whole board with a flux pen (donated by <strike>Adrian</strike>Farnell, left by the box of sharpies). | ||
* Addendum: My first board was ruined by leaving a lip where I'd cut it (hacksaw). Always make sure the board is perfectly flat! I left some developer and etchant in the trays since I'm sure they'd by good for a few more runs and I wasn't sure how to dispose of them. | * Addendum: My first board was ruined by leaving a lip where I'd cut it (hacksaw). Always make sure the board is perfectly flat! I left some developer and etchant in the trays since I'm sure they'd by good for a few more runs and I wasn't sure how to dispose of them. | ||
