Abstract:
A pixel cell includes a substrate, an epitaxial layer, and a photo converting device in the epitaxial layer. The epitaxial layer has a doping concentration profile of embossing shape, and includes a plurality of layers that are stacked on the substrate. The photo converting device does not include a neutral region that has a constant potential in the vertical direction. Therefore, the image sensor including the pixel cell has high quantization efficiency, and a crosstalk between photo-converting devices is decreased.
Abstract:
A method of manufacturing an image sensor is provided. In this method, a photoelectric conversion unit may be formed within a semiconductor substrate, wherein the semiconductor substrate includes an active pixel region and an optical black region. An annealing layer may be formed on the active pixel region and the optical black region and etched so that the annealing layer covers at least a portion of the optical black region. A wiring pattern may be formed on the annealing layer. A light-blocking pattern may be formed on the wiring pattern so as to cover the entire photoelectric conversion unit of the optical black region, thereby blocking light from being incident upon the optical black region.
Abstract:
An FPCB and a method of manufacturing the same, in which an electrical signal-conductive portion of the FPCB is subjected to little stress so as not to be broken by fatigue in spite of repeated bending of the FPCB, thereby increasing the lifetime of the FPCB.
Abstract:
Provided are a chip, a chip stack, and a method of manufacturing the Same. A plurality of chips which each include: at least one pad formed on a wafer; and a metal layer which protrudes up to a predetermined thickness from the bottom of the wafer and is formed in a via hole exposing the bottom of the pad are stacked such that the pad and the metal layer of adjacent chips are bonded. This leads to a simplified manufacturing process, high chip performance and a small footprint for a chip stack.
Abstract:
An image pickup device includes an active pixel sensor (APS), a row driver, and a leakage current breaker. The active pixel sensor includes an array of a plurality of pixels. The row driver selects at least one pixel to be activated to output signals. The leakage current breaker decreases the leakage current through the unselected pixels by applying a leakage current breaker voltage at the bit lines of the APS array.
Abstract:
A CMOS image sensor includes a photosensitive device, a floating diffusion region, a transfer transistor, and a pocket photodiode formed in a semiconductor substrate of a first conductivity type. The floating diffusion region is of a second conductivity type. The transfer transistor has a channel region disposed between the photosensitive device and the floating diffusion region. The pocket photodiode is of the second conductivity type and is formed under a first portion of a bottom surface of the channel region such that a second portion of the bottom surface of the channel region abuts the semiconductor substrate.
Abstract:
Disclosed are a heterojunction bipolar transistor and a method of fabricating the same. A first dielectric layer easily etched is deposited on the overall surface of a substrate before an isolation region is defined. The first dielectric layer and a sub-collector layer are selectively etched, and then a second dielectric layer etched at a low etch rate is deposited on the overall surface of the substrate. Via holes are formed in the first and second dielectric layers, and then the first dielectric layer is removed using a difference between etch characteristics of the first and second dielectric layers. Accordingly, a reduction in power gain, generated at the interface of a compound semiconductor and a dielectric insulating layer (the second dielectric layer), can be eliminated.
Abstract:
There are provided a character entry apparatus and a character entry method using numeric keys, the character entry apparatus including: a number input section having ten numeric keys of 0 to 9 for entry of a number set corresponding to a desired character; a display for displaying the character corresponding to the number set; and a controller for storing a character input table providing an arrangement of a plurality of characters each corresponding to a number set and when a number set is input through the number input section, controlling to display the corresponding character arranged in the character input table and associated with the number set through the display, the number set being formed to include a first number selected from a first number group having a plurality of numbers and a second number selected from a second number group having a plurality of numbers arranged independent of the first number group. The character entry apparatus and method may enhance the character input speed and simplify the character entry procedure.