An aspect of the present invention simplifies the implementation of complex clock designs in field programmable devices. Thereby, the Al terminal made of Al or Al alloy can be crimped from outside the terminal fitting main body made of copper or copper alloy, and the spring back of the terminal fitting main body made of copper or copper alloy can be suppressed by the Al terminal. Further, over the semiconductor film, the third conductive film is interposed between the pair of second conductive films and away from the pair of second conductive films. The zigzag paths are defined by total internal reflection of the beam portions as they propagate through the gain medium slab. When the rear end of the duct is pushed into the grass bagger inlet, the tabs on the grass bagger inlet engage the spiral rib on the duct in a ratchet type engagement to releasably hold the duct in the grass bagger inlet. The actual Pixon elements selected from this basis during the reconstruction process represents the smallest number of such units required to fit the data and representing the minimum number of parameters necessary to specify the image.