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NEC Linear CCD Sensors in Plastic Package for multifunctional printers with scanner


NEC Electronics Corp will launch three linear CCD sensors, the μPD8834CT, the μPD8831CT and the μPD8864CT, for use in multifunctional printers with a scanner. The NEC sensors ensure performance comparable with or even superior to that of existing products in ceramic packages, even though they are packaged in plastic. With the scanning resolution set to 24 dots per millimeter, the μPD8834CT and the μPD8831CT can scan documents up to A3 size, while the μPD8864CT can scan up to A4 size.
Press release after the jump


Volume production of the NEC μ8834CT and the μPD8831CT will start in the third quarter of fiscal 2008, while the μPD8864CT will be mass produced from the fourth quarter of fiscal 2008. NEC plans to increase the monthly production of the three models in total to 800,000 units by the end of fiscal 2008.
NEC Electronics Corp will launch three linear CCD sensors, the μPD8834CT, the μPD8831CT and the μPD8864CT, for use in multifunctional printers with a scanner.
The sensors ensure performance comparable with or even superior to that of existing products in ceramic packages, even though they are packaged in plastic. With the scanning resolution set to 24 dots per millimeter, the μPD8834CT and the μPD8831CT can scan documents up to A3 size, while the μPD8864CT can scan up to A4 size.
NEC Electronics provided a copper heatsink directly under the amplifier circuit, which generates a high temperature inside the chip, and formed a heat conduction path to the bottom face of the package. As a result, the heat dissipation performance of the package is enhanced, and the heat resistance is reduced to 50K/W. The resistance is about 37% lower than that of the existing products in ceramic packages, the company said.
The company also improved the shape of the metal pins connecting the chip and the board so that the deformation stress from the mounting board can be absorbed. Thus, the warpage variation due to the stress from the mounting board can be reduced.
In addition, the heatsink has a size equivalent to that of the amplifier, and its material is replaced by copper so that the variation in expansion coefficient of the entire package is reduced. Furthermore, the company reportedly equalized the volume ratio between the upper and lower parts of the package to adjust the volume increase due to humidification/dehumidification.
In this way, the stress resulting from the changes in temperature/humidity can be decreased, the company said.
The μPD8834CT is equipped with scanning lines for R/G/B colors and a line dedicated for monochrome scanning. The μPD8831CT has R/G/B scanning lines. Both models have an effective pixel count of 7,500 per line and a pixel pitch of 4.7μm.
When A4 size documents are scanned in a longitudinal direction, the μPD8834CT can process about 30 pages per minute in color and 60 pages per minute in monochrome. The μPD8831CT can scan about 60 pages per minute in color. The two models operate with a single power supply at +10V.
The μPD8864CT has R/G/B scanning lines. Each line has an effective pixel count of 5,400 and the pixel pitch of 7μm. The scanning speed is about 60 pages per minute in color when A4 documents are scanned in a longitudinal direction. It operates with a single power supply at +10V.
Samples of all models are now available at ¥1,500. Volume production of the μ8834CT and the μPD8831CT will start in the third quarter of fiscal 2008, while the μPD8864CT will be mass produced from the fourth quarter of fiscal 2008. The company plans to increase the monthly production of the three models in total to 800,000 units by the end of fiscal 2008.




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