Abstract:
Semiconductor chips, such as photosensor arrays for a full-page-width scanner or printhead chips for a full-page-width ink-jet printer, are mounted on a substrate to maintain reasonably consistent spacing among adjacent chips. To remove a defective chip from the array, the substrate is urged evenly against a work surface defining a convex bow. Alternately, back-cuts are provided along abutting edges of the chips, and the silicon around these back-cuts can be sawed away to space defective chips from neighboring good chips.
Abstract:
In a photosensitive chip suitable for full-color imaging, separate photosites on the chip correspond to different primary colors in an original image. Each primary-color photosite is filtered with a polyimide doped to a particular primary color. The red-filtering layer and the blue-filtering layer are left on the non-photosensitive portions of the main surface of the chip, and together serve as a non-reflective area which prevents stray reflections from the chip. The chip is further provided with a base layer of infrared-filtering polyimide.
Abstract:
An improved process for forming individual dies having faces that allow the dies to be assembled against other like dies to form one and/or two dimensional scanning arrays with minimal chipping and fracturing wherein the active side of a wafer is etched to form separation grooves with the wall of the grooves adjoining the die presenting a relatively wide surface to facilitate sawing, wide grooves are cut in the inactive side of the wafer opposite each separation grooves, and the wafer cut by sawing along the separation grooves, the saw being located so that the side of the saw blade facing the die is aligned with the midpoint of the wide wall so that on sawing the bottom half of the wall and the remainder of the grooves are obliterated leaving the top half of the wall to prevent cracking and chipping during sawing.
Abstract:
A photosensitive imaging device for recording images across the entire visible spectrum includes a set of photosensors which have a peak response around the orange part of the spectrum, about 600 nm. The peak response is obtained by combining responses of, in one case, photosensors associated with a filter which admits red or infrared wavelengths and longer and photosensors associated with a filter which admits orange wavelengths and longer. In another case, the photosensor is structured to attenuate longer wavelengths, which, in combination with a filter which admits orange and longer wavelengths, can simulate a peak behavior around the orange part of the spectrum.
Abstract:
A photosensitive apparatus including a full width array of photosensors and a first photosensor chip. The first photosensor chip including a linear array of photosensors having a plurality of pixels arranged in a long direction and a linear variable filter adapted to transmit at least ten unique bandwidths of wavelengths of light along a length of the linear variable filter where the linear variable filter is fixedly secured to the linear array. Each respective pixel receives a unique bandwidth of wavelengths of light as a light passes through the linear variable filter and the length is aligned with the long direction. The full width array of photosensors is arranged perpendicular to a process direction of a printing device.
Abstract:
An architecture and manufacturing method for photosensitive chips, such as used in office equipment and digital cameras, involves creating grooves between chip areas in a wafer, and then placing a light-transmissive planar layer over the main surface of the wafer. The planar layer, which may be acrylic-based, creates a substantially planar surface over both the photosites in the chip areas and the grooves. The planar layer in turn supports one or more light-transmissive filtering layers. The arrangement avoids damage to the filtering layers when the wafer is diced along the grooves.
Abstract:
The present invention generally relates to a digital scanner for scanning images. More specifically, the present invention is directed to a method and apparatus for enhancing the quality of scanned images obtained by filtering out the infrared component of digital data to provide enhanced digital images.
Abstract:
A color space transformation device includes a sensor bar. The sensor bar includes a plurality of sensor chips. Each sensor chip scans a unique section of an original image to produce first data in a first color space. A memory means stores groups of coefficients. Each group of coefficients corresponds to one of the sensor chips. A processor independently transforms each of the sections of the first data to a respective section of a second data. The transformation is performed as a function of one of the groups of coefficients corresponding to the sensor chip which produced the first data.
Abstract:
A process for fabricating a full width array in which plural smaller chips are bonded end-to-end onto the metallic covering of an elongated substrate by an electrically conductive heat activated adhesive, in which a photocurable adhesive is used to temporarily retain the smaller chips in position while the heat activated adhesive is cured, the process accommodating the inability to cure the photocurable adhesive through the opaque chips and substrate covering by locating the photocurable adhesive so that it extends outside of the boundary of the smaller chips and forms an adhesive fillet or bridge between one side of the smaller chips and the substrate when cured by ultraviolet light.In an alternate embodiment, the photocurable adhesive is located within the boundary of the smaller chips initially but is squeezed out from below the smaller chips to form the exposed adhesive bridge when the smaller chips are placed on the substrate.
Abstract:
A photosensitive imaging device for recording images across the entire visible spectrum includes a set of photosensors which have a peak response around the orange part of the spectrum, about 600 nm. The peak response is obtained by combining responses of, in one case, photosensors associated with a filter which admits red or infrared wavelengths and longer and photosensors associated with a filter which admits orange wavelengths and longer. In another case, the photosensor is structured to attenuate longer wavelengths, which, in combination with a filter which admits orange and longer wavelengths, can simulate a peak behavior around the orange part of the spectrum.