A film-on-wire spacer covers an entire upper surface of a lower electronic component. Accordingly, an upper electronic component is supported above bond pads and lower bond wires of the lower electronic component. This decreases the stress on the upper electronic component, e.g., during wirebonding,...http://www.google.es/patents/US7675180?utm_source=gb-gplus-sharePatente US7675180 - Stacked electronic component package having film-on-wire spacer
Stacked electronic component package having film-on-wire spacer