Where did you get that image from?
http://forums.eagle.ru/showthread.php?p=1978041
This information was mainly gathered from a very interesting article that came in a Combat Aircraft Magazine issue, regarding the history of stealth and it's application on US stealth aircraft (F-117, B-2, F-22 and F-35), this among other sources.
It would be REALLY NICE if you do bother to share it here....