In the transmission of mechanical movements, a mechanical angular positioning device is provided, and applies to optical instruments to position an element like a mirror according to three predefined positions. Memory store requests are separated into an address phase and a data phase. a honeycomb or plate, or a collection of individual support particles that have been treated with solutionssuspensions of catalyst ingredients to produce cells, spots or pellets holding each of a variety of combinations of the ingredients and dried, calcined or treated as necessary to stabilize the ingredients in the cells, spots or pellets. The first and second elongate members hold the laser component and the spacers therebetween. Moreover, easy oxidation of the surrounding sidewall of the electroless nickel bump and short circuit of the bump caused by electron migration can both be avoided.