Touch screens
... • Force activated so can use finger even with a glove, stylus or any other (non sharp) prodding device • Contacts are make or break so not pressure sensitive • Conductive coating reduces display brightness • Continual flexing of outer layer causes microscopic cracks so affects linearity of resistanc ...
... • Force activated so can use finger even with a glove, stylus or any other (non sharp) prodding device • Contacts are make or break so not pressure sensitive • Conductive coating reduces display brightness • Continual flexing of outer layer causes microscopic cracks so affects linearity of resistanc ...
Compact Disc manufacturing
Compact disc manufacturing is the process by which commercial compact discs (CDs) are replicated in mass quantities using a master version created from a source recording. This may be either in audio form (CD-Audio) or data form (CD-ROM). This process is used in the mastering of read-only compact discs; CD-Rs, CD-RWs, and DVDs are made somewhat differently, though the methods are broadly similar. A CD can be used to store audio, video, and data in various standardized formats defined in the Rainbow Books. CDs are usually manufactured in a class 100 (ISO 5) or better clean room; they can usually be manufactured to quite strict manufacturing tolerances for only a few US cents per disk.CD mastering differs from burning, as the pits and lands of a mastered CD are moulded into a CD blank, rather than being 'burn marks' in a dye layer (in CD-Rs) or areas with changed physical characteristics (in CD-RWs). In addition, CD burners write data sequentially, while a CD pressing plant 'writes' the entire disk in one physical stamping operation.