Description  Claims  Drawing  Cited references 

EP1693899A2   [0020] 
DE102007011403A1   [0021] 
US20020144724A1   [0022] 
EP1030376A1   [0023] 
WO2010116973A   [0024] 
WO9960606A   [0024] 
US6248948B1   [0024] 
US3527619A   [0059] 

Journal of Applied Physics   [0057]