Sounds like you got some motherboards fitted with capacitors filled with faulty electrolyte manufactured by a company that stole the recipe (but got it wrong) in a case of bungled corporate espionage in 2003.

"According to the source, a scientist stole the formula for an electrolyte from his employer in Japan and began using it himself at the Chinese branch of a Taiwanese electrolyte manufacturer. He or his colleagues then sold the formula to an electrolyte maker in Taiwan, which began producing it for Taiwanese and possibly other capacitor firms. Unfortunately, the formula as sold was incomplete."

http://www.boingboing.net/2003/05/27/bungled-espionage-bl.html

I think you might be completely mistaken. ;)

"Dielectric composites are relatively transparent to radar, whereas electrically conductive materials such as metals and carbon fibers reflect electromagnetic energy incident on the material's surface."

http://en.wikipedia.org/wiki/Stealth_technology