Homebrew PCBs

----- Original Message ----- 
From: "derekhawkins" <eldata@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Wednesday, January 25, 2006 12:37 PM
Subject: [Homebrew_PCBs] Re: Making a homebrew board using QFN packages


>> You could reflow it in a wok.
>
> Toaster oven would be better. Saw a nice infrared convection toaster
> oven with digital temperature display and controls, if only it was
> programmable.

Better in what way? If you're buying new, sure, get the toaster oven. I had 
an old skillet on hand, and it stores very compactly. The "face" is open so 
I can readily watch it cook, and even point an IR thermometer at it if I 
want. But I haven't found a need. Medium flame, anywhere in the middle third 
of the dial, gives a usable temp profile.

>> Solder paste is (relatively) cheap: $16
>
> That's $16.00 for 1.2 ounces BTW.

Yup, and it has a shelf life of about a year. 35 grams is more than a 
non-production shop can use in that time. I'll likely throw out more than 
half of it. In the meantime, I gain all the benefits. What can be simpler 
than mashing the tiny parts approximately into place, and then stir frying 
for 4 minutes? (Peanut butter and jelly sandwiches come to mind, but not by 
much.)