Beryllium Oxide BeO substrates

Beryllium Oxide (Beryllia) Substrates

Beryllium Oxide (Beryllia) substrates have thermal conductivity of 260 W/mk - that makes it the desirable material for high power microelectronic applications. Until fairly recently, this has been the case but now there is a controversy! Is BeO safe? Judge for yourself.

Related Beryllia Web Pages:

• Safety data for Beryllium Oxide
• Beryllium Industry Scientific Advisory Committee
• Beryllium Oxide Substrates Replaced by Aluminum Nitride
• Aluminum Nitride (AlN) Products Update

Because of the safety controversy and also the cost, Beryllium Oxide has lost its popularity and Aluminum Nitride is replacing BeO in numerous applications. Aluminum Nitride substrates are more expensive than 99.5% Alumina Ceramic substrates but not that drastically.
Hybrid circuit designers sometimes choose Aluminum Nitride because they are not sure if alumina has the required thermal conductivity. Other times it is, of course, an absolute necessity. Beryllium Oxide substrates are being chosen less and less frequently.

Thermal management substrate related Web sites:

• www.aluminumnitride.com/alnplus.htm Aluminum Nitride substrate chemical analysis
• www.aluminumnitride.com/dicing.htm Dicing Aluminum Nitride AlN wafers and substrates
• www.aluminumnitride.com/polished.htm Polished Aluminum Nitride AlN substrates and wafers
• www.aluminumnitride.com/substrate-mfg.htm Manufacturing tape cast Aluminum Nitride substrates

Return to Home Page: Aluminum nitride substrates, aluminum nitride wafers

Updated: 14 June 2012

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