In PDPs, size is everything. The large screens up to 40 inches across have about a million pixels on its surface. The tiny size and precision of these pixels demands accurate and precise materials in their production - much like the precision demanded in producing tiny hybrid circuits and ceramic multichip modules.
DuPont thick-film materials and patterning technologies are precise enough to be used in the tiny pixels of the PDP. They perform consistently over a long period of time. For hybrid circuits, this precision and accuracy pay dividends in circuit yield, miniaturization, and cost-effectiveness.
Advanced DuPont BIROX® resistor materials are placed in each of the PDPs discharge cells. The resistors provide excellent resistance control and consistency. They lower each cell's discharge current, (extending the life of the cells) and give the cells consistent brightness and lifetime.
DuPont dielectric tape materials help fabricate the PDPs discharge cells. The uniform thickness of the ceramic film is critical to the function of each cell in the display. In this case, the ceramic film thickness is controlled to ±3 percent over the complete length and width of the tape.
DuPont photolithographic patterning technique is used to form features in Fodel® photosensitive thick film materials. This technique lets PDP designers accurately lay materials down over large areas, which is impossible with normal screen printing techniques.
- For ceramic circuit applications, BIROX® resistors provide excellent temperature co-efficient of resistance (TCR), have low sensitivity to refiring, and are compatible with silver and silver/palladium terminations.
- The film-coating technology used to create the PDP tape is also used to produce DuPont Low-Temperature Cofired Ceramic (LTCC) product, Green Tape™ . Uniform thickness is critical in Green Tape applications like ceramic multichip modules (MCM-Cs) and components, to meet electrical performance requirements and ensure isolation between the multilayer circuit tracks.
- The high-precision photolithographic patterning technology used in PDPs allows hybrid circuit designers to image conductor lines and spaces down to 50 microns. If also produces smaller vias than can be obtained by screen printing.
» More information on DuPont Plasma Display Materials
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