RadioBanter - View Single Post

June 7th 05, 05:25 AM

In article . com,
wrote:

Solder problems seem to be the case in all the cheezy "yellow board",
single-sided consumer grade pc boards. I see it all the time in
cheap power supplies. If the boards have plated thru holes the
problem is almost non-existent.

It's a single sided board. You think the hole plating is going to help
relieve mechanical or heat stress? I think you mean an actual rivet
right?

A hole in a circuit board can have three types of through construction
in increasing order of duty:

1. Plated through.

2. A cylinder of copper inserted and then plated to the top and or
bottom pads.

3. A rivet of copper. The cylinder of copper is inserted in the board
longer than the board thickness and crimped to the board pads.

My descriptions are a little clumsy as I don't know the exact board
fabrication terminology.

I expect you mean #3.

These power supply manufacturing companies have a lot of tough
competition and try to figure a way to squeeze every penny out of the
cost of a supply.

--
Telamon
Ventura, California