1. 
   Polyimide
   A material used as a Substrate for a PCB. Has superior thermal coefficient of expansion over FR4, and rated for higher temperatures. Consequently, often used in military designs.
   Found op http://www.vutrax.co.uk/glossary.htm
   
   
2. 
   Polyimide
   A family of polymers involving carbon and nitrogen bonds, known for good thermal stability, mechanical toughness and chemical resistance used in thick/thin film microelectronics and displays.
   Found op http://www.xaar.com/glossary.xhtml
   
   
3. 
   Polyimide
   Highly heat-resistant polymer resin.
   Found op http://www.komprex.com/Glossary/index.htm
   
   
4. 
   polyimide
   (from the article `industrial polymers, major`) Polyimides are polymers that usually consist of aromatic rings coupled by imide linkages—that is, linkages in which two carbonyl (CO) groups are ...
   Found op http://www.britannica.com/eb/a-z/p/90
   
   
5. 
   Polyimide
   Polyimide (sometimes abbreviated PI) is a polymer of imide monomers. The structure of imide is as shown. Polyimides have been in mass production since 1955. Typical monomers include pyromellitic dianhydride and 4,4`-oxydianiline. ==Classification== According to the composition of their main chain, ...
   Found op http://en.wikipedia.org/wiki/Polyimide
   
   

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