H ELECTRICITY
H01 ELECTRIC ELEMENTS
H01L SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
23/00 Details of semiconductor or other solid state devices
H01L23/28 Encapsulations, e.g. encapsulating layers, coatings,; e.g. for protection
H01L23/31 characterised by the arrangement; or shape
H01L23/3107 the device being completely enclosed
H01L23/3114 the device being a chip scale package, e.g. CSP