[CCTECH] more Hobbit photos

From: Tothwolf <tothwolf_at_concentric.net>
Date: Thu May 23 14:46:08 2002

On Thu, 23 May 2002, Jeff Hellige wrote:

> >I was starting to wonder how they might have installed that QFP without a
> >cover. It would be possible to hand solder such a chip, instead of using
> >an automated hot air system, but hand soldering that size of QFP would not
> >be an easy task, and there would be a serious risk of flux contamination
> >of the die. I really haven't seen too many chips that used a clear cover,
> >and I'd guess they were still debugging/testing that particular chip.
>
> I really had to turn the system slowly in the light to see that there
> was something covering the whole chip. It was very difficult to spot.

The cover is probably removable, thought I'd certainly not try removing
it... The reason they'd use a removable cover is so the whole board could
be put in a stand, under a micro-manipulator, and tiny probes could be
used to probe at different spots on the chip's die.

-Toth
Received on Thu May 23 2002 - 14:46:08 BST