| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a computer chassis which is superior in a recycle property having a transparent property and an effect for electromagnetic shield and so on with less changes with respect to change in time change by making the part of a chassis of lead glass having a transparent and electromagnetic shield property. SOLUTION: All a front cover 2, an upper chassis 3 and a lower chassis 4 is made by molding lead glass containing 35 to 40 wt.% of oxide lead. In the case that a ratio of oxide lead is too low, an obtained effect of anti- electrostatic or electromagnetic shield is reduced. In the case that the component of oxide lead is too high, melting temperature of lead glass is decreased, and the chassis is easily deformed by heating in the case of functioning chassis constructing parts. Therefore a content of oxide lead in lead glass is preferably set to be 15 to 55 wt.%. A nickel layer 12 which is a barrier layer for preventing metal from perfusion is formed on the surfaces of a front cover 2, the upper chassis 3 and the lower cover 4 which are various chassis type parts by vacuum evaporation, and a gold layer is formed on the surface of nickel layer by vacuum evaporation.</p> |
