From ed18fc74fd3a3049ed9a8b56ca7ebbeb7e14116a Mon Sep 17 00:00:00 2001 From: Mark van Renswoude Date: Sun, 25 Nov 2018 13:48:43 +0100 Subject: [PATCH] Updated etching (markdown) --- electronics/electronics/pcbfabrication/etching.md | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/electronics/electronics/pcbfabrication/etching.md b/electronics/electronics/pcbfabrication/etching.md index cc4ab62..cb563fc 100644 --- a/electronics/electronics/pcbfabrication/etching.md +++ b/electronics/electronics/pcbfabrication/etching.md @@ -13,6 +13,10 @@ ___ ## Etching +Note that ferric chloride is corrosive and leaves nasty stains. Wear gloves, use plastic containers and be careful not to splash it everywhere especially when using a brush. + I prefer to pour a small amount of ferric chloride in a plastic container and rub it on the board with a small piece of sponge or a brush. This usually takes 10 minutes depending on if the ferric chloride has already been used and the temperature, but allows you to monitor the process closely and focus on the unetched parts. In contrast to dipping the board in a bigger tank, this tends to etch from the inside out. -If you're going to do more than the occasional board, look up better methods. \ No newline at end of file +If you're going to do more than the occasional board, you might want to look up better methods. + +Once it's done, wait until most of the ferric chloride has dripped off and rinse it off with plenty of water. Inspect it under a microscope. If you find spots that haven't been etched completely there might still be some photoresist on it. Scratch it off and go back to the ferric chloride, or simply cut the trace with a knife if it's small enough. \ No newline at end of file