The invention provides a semiconductor unit and a semiconductor apparatus having a low electric resistance as a whole, even when the electric resistance of a functional layer or a semiconductor substrate is high. A method of making the semiconductor unit and apparatus is also provided. An electrooptic apparatus and an electronic apparatus are also provided. A semiconductor apparatus includes a predetermined substrate and a semiconductor unit bonded to the substrate. The semiconductor unit includes a highly conductive layer and a functional layer including a semiconductor element.

 
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> Optical information recording method and apparatus for multiple recording layer medium

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