Abstract:
A method for manufacturing a floating gate in a non-volatile memory device is provided to improve a coupling ratio by adjusting a height of a floating gate. A field oxide layer pattern(112) is formed on a surface of a substrate(100) to form an opening for exposing a part of the substrate. A conductive layer for floating gate is formed along the field oxide layer pattern and the surface of the exposed substrate. A stop layer is formed on the conductive layer for floating gate. A sacrificial layer is formed on the stop layer to fill the opening. A preliminary floating gate is formed by polishing the sacrificial layer to expose the stop layer on a bottom surface of the opening. A floating gate(126) is formed by removing selectively the stop layer.
Abstract:
본 발명에 따른 줌 렌즈는, 부의 굴절력을 갖는 제1 렌즈군과; 상기 제1 렌즈군보다 상면에 보다 가까운 정의 굴절력을 갖는 제2 렌즈군과; 상기 제2 렌즈군보다 상기 상면에 보다 가까운 제3 렌즈군을 포함하고, 상기 줌 렌즈가 광각단에서 망원단으로 변배함에 따라, 상기 제1 렌즈군과 상기 제2 렌즈군간의 거리는 감소하고, 상기 제2 렌즈군과 상기 제3 렌즈군간의 거리는 증가한다. 줌 렌즈, 프리즘, 굴절력, 변배비, 조리개
Abstract:
A keypad assembly for a mobile phone is provided to reduce a unit cost of production by reducing the number of mounted light emitting diodes. In a keypad assembly for a mobile phone, a keypad includes a pad unit(210) with a plurality of key buttons(K), a light guide panel(220) located between the pad units(210), and a reflection apparatus(260) making light transmitted from the light guide panel(220) toward each key button(K). A light source(230) provides light to the reflection apparatus(260). A plurality of spacers(225) is mounted at the lower side of the light guide panel(220) and supports a separated state with a substrate. A switch unit(240) applies a signal and is located at the lower side of the pad unit(210). A casing unit surrounds the key pad.
Abstract:
A keypad and a keypad assembly are provided to brightly and uniformly illuminate key buttons by having an elastic light guide panel between the key buttons and protrusions. In a keypad(210), light is guided to a light guide panel(220). At least one key button(245) is located on the top surface of the light guide panel(220). At least one reflective pattern(230) is locally formed on the light guide panel(220), and reflects a part of the light guided to the light guide panel(220) to the key button(245).
Abstract:
본 발명에 따른 반도체 기판 상에 다수의 층을 형성한 반도체 단일 집적 광송신기는, 기설정된 파장의 광을 반사시키기 위한 격자와, 광을 발진시키며 상기 격자에 의해 반사된 광을 그 내부로 진행시키기 위한 제1 활성층을 포함하는 분포 귀환형 레이저와; 상기 제1 활성층에서 출력된 광을 그 내부로 진행시키며, 인가된 전압에 따라 그 흡수도가 변화됨으로써 상기 광을 세기 변조하는 제2 활성층을 포함하는 전계 흡수 변조기와; 상기 제2 활성층에서 출력된 광을 그 내부로 진행시키며, 상기 광을 증폭하는 제3 활성층을 포함하는 반도체 광증폭기와; 상기 제1 내지 제3 활성층의 사이사이에 배치되며, 각각 입력된 광을 감쇠시키는 제1 및 제2 광감쇠기를 포함한다.
Abstract:
광통신 모듈에 관해 개시된다. 개시된 광통신 모듈은: 광학적 부품이 탑재되는 플랫폼과; 상기 플랫폼의 일측에 마련되는 것으로 플랫폼의 평면에 실질적으로 나란한 방향으로 출사하는 레이저 다이오드와; 상기 레이저 다이오드의 후방광 진행축 상에 마련되어 레이저 다이오드로부터 방출된 후방광을 광학적으로 제어하는 콜리메이팅 렌즈와; 상기 콜리메이팅 렌즈를 통과한 레이저 광이 공히 도달되는 제1수광영역과 제2수광영역을 가지는 수광소자와; 상기 제1수광영역의 전방에 마련되어 제1수광 영역으로 입사하는 레이저 광을 필터링 하는 광학적 밴드패스필터를; 구비한다. 이러한 본 발명의 광통신 모듈은 종래의 모듈에 비해 구조가 간단하고 모든 부품이 피듀셜 마크(fiducial mark) 에 의한 패시브 얼라인이 가능하므로 비용 및 크기를 줄일 수 있고, 특히 우수한 양산성 등의 장점을 가진다.
Abstract:
PURPOSE: A semiconductor monolithic integration optical transmitter is provided to enable a single packaging and to reduce power consumption by reducing a size of the optical transmitter. CONSTITUTION: A semiconductor monolithic integration optical transmitter(300) includes a plurality of layers formed on a semiconductor substrate(310). The optical transmitter includes a distribution feedback laser(450), an electroabsorption modulator(460), a semiconductor optical amplifier(470), and first and second optical attenuators(350,360). The distribution feedback laser includes a lattice for reflecting a light having a predetermined wavelength and a first active layer for passing the reflected light therein. The electroabsorption modulator passes the light output from the first active layer therein, and includes a second active layer which amplitude modulates the light by varying an absorbance. The semiconductor optical amplifier passes the light from the second active layer therein and includes a third active layer amplifying the light. The first and second optical attenuators are arranged between the first through third active layers and attenuate the input light.
Abstract:
An optical coupling device (210) for coupling light to a core (242) of an optical waveguide device (240). The optical coupling device is connected to the core of the optical waveguide device at a first end (214) and convex at a second end (212) opposite the first. The optical coupling device includes a waveguide connecting the first and second ends of the optical coupling device, for light transmission, and a cladding (244) surrounding the waveguide.
Abstract:
PURPOSE: An optical communication module using an absorbing layer is provided to prevent the transmission of the stress to an optical fiber by absorbing the stress between a silicon optical bench and a substrate. CONSTITUTION: A substrate(110) is formed with a Kovar material. A bonding pad and circuit elements are formed on an upper surface of a silicon optical bench(120). A V-shaped groove(115) is formed on the upper surface of the silicon optical bench in order to fix an optical fiber(150). The first and the second semiconductor chips(130,140) are adhered on the upper surface of the silicon optical bench by using AuSn material. The optical fiber is formed on the V-shaped groove. An epoxy(160) is coated on an upper surface of the optical fiber. An absorbing layer(170) is used for absorbing the stress transmitted from the silicon optical bench to the substrate.