Abstract:
A multilayer printed circuit board and a method for manufacturing the same are provided to have high resistance to an external impact by enclosing a circuit pattern with an insulation layer and to improve the yield and shorten a manufacturing time by integrally laminating laminated plates through thermal compression. A multilayer printed circuit board includes a first laminated plate, a second laminated plate. The first laminated plate has a first insulating layer(130), a first circuit pattern(115), a first via-hole(150), and a conductive material. The first circuit pattern(115) is laid on the first insulating layer(130). A lower part of the first circuit pattern(115) is exposed. The first via-hole(150) is formed on an upper part of the first circuit pattern(115) and penetrates the first insulating layer(130). The conductive material is filled in the first via-hole(150). A second circuit pattern is laid on a location corresponding to the first circuit pattern of a second insulating layer. An upper part of the second circuit pattern is exposed. A second via-hole is formed on a lower part of the second circuit pattern and penetrates the second insulating layer. A conductive material is filled in the second via hole. The second laminated plate is electrically connected to the first laminated plate when the conductive material filled in the first via-hole corresponds to the conductive material filled in the second via-hole.
Abstract:
A front end module in a mobile communication device is provided to reduce signal loss due to electric lines and to reduce the volume. A first dielectric layer(301) includes a power amplifier IC and a micro strip line. A second dielectric layer(302) includes a duplexer, an LPF(Low Pass Filter), and an HPF(High Pass Filter). A third dielectric layer(303) includes an upper pattern of a capacitor which suppresses a DC component of a transmission signal and is arranged under the second dielectric layer. A fourth dielectric layer(304) includes a third inductor pattern and a lower pattern of the capacitor for suppressing the DC component from the transmission signal, and is arranged under the third dielectric layer. A fifth dielectric layer(305) includes two shunt capacitors for impedance matching and is arranged under the fourth dielectric layer. Two ground dielectric layers(306,308) include a ground pattern of a transmission line, so that a transmission bandpass filter is duplexed with a reception bandpass filter. A sixth dielectric layer(307) includes ground patterns for the transmission line and the micro strip line. A seventh dielectric layer(309) includes a DC bias RF(Radio Frequency) choke, which is connected to the micro strip line and the shunt capacitor.
Abstract:
본 발명은 열경화형 후막 레지스터 제조방법 및 이에 따른 레지스터에 관한 것으로, 특히 기판 위에 금속 물질을 증착하는 단계; 사진 식각(Photo Etching) 공정으로 상기 금속 물질의 양쪽 일부 영역을 식각 하여 하부 금속 패드를 형성하는 단계; 상기 하부 금속 패드를 덮도록 후막 레지스터 페이스트 또는 잉크를 도포하는 단계; 상기 도포 된 후막 레지스터 페이스트 또는 잉크를 건조 및 열처리하여 저항체를 형성하는 단계; 상기 저항체가 형성되지 않은 기판 위에 절연체 물질을 도포함으로써 절연층을 형성하는 단계; 및 상기 저항체 및 절연층 위에 금속 물질을 증착한 후, 상기 금속 물질의 양쪽 일부를 식각하여 상부 금속 패드를 형성하는 단계로 이루어지는 열경화형 후막 레지스터 제조방법에 의하는 경우, 하부와 상부 금속 패드 사이에 레지스터가 위치하고, 금속 패드와 레지스터의 접촉면이 매우 정밀하게 형성되어 저항값이 현저하게 균일해진 레지스터를 제조할 수 있는 효과가 있다. 후막 레지스터, 절연층, 금속 패드
Abstract:
본 발명은 듀얼밴드 이동통신 단말기에서 제 1 주파수 대역의 신호와 제 2 주파수 대역의 신호를 스위칭하는 데 사용되는 적층 스위칭 모듈을 제공한다. 본 발명의 적층 스위칭 모듈은 제 1 및 제 2 주파수 대역의 신호를 스위칭하는 데 필요한 인덕터 및 커패시터 등과 같은 단위소자들을 복수의 세라믹 시트에 패턴으로 인쇄하고, 그 단위소자의 패턴을 인쇄한 복수의 세라믹 시트를 적층하여 일체화시킨 3차원 구조로 형성한다. 그리고 세라믹 시트에 패턴으로 인쇄할 수 없는 다이오드, 저항 및 대용량의 커패시터 등과 같은 표면실장 단위소자들은 최상단에 위치하는 세라믹 시트의 표면에 칩 부품으로 실장한다. 그러므로 본 발명의 적층 스위칭 모듈은 칩 부품의 비용과, 칩 부품들을 실장하기 위한 실장 비용을 절감할 수 있고, 3차원적으로 적층 스위칭 모듈을 제조하여 크기를 줄인다. 듀얼밴드, 이동통신 단말기, 세라믹 시트, 패턴, 적층, 듀플렉서, 스위칭
Abstract:
본 발명은 고주파 통신 모듈의 패키징 장치 및 그 제조 방법에 관한 것으로서, 본딩 와이어를 통해 고주파 통신 모듈의 상면에 형성된 패드와 전기적으로 연결되는 패키징 장치의 급전선 하부에 이중의 금속층을 형성함으로써, 이를 통해 병렬 커패시턴스를 형성해 본딩 와이어로 인한 고주파 기생 인덕턴스를 감소시켜 고주파 영역에서의 급전선 전송 특성을 향상시킬 수 있도록 한다. 고주파, 모듈, 패키징, 금속, 단자, 이중층, 급전선
Abstract:
본 발명은 내장형 세라믹 인덕터의 제조방법에 관한 것으로, 사진식각 공정을 수행하여 정밀한 인덕터 패턴을 그린시트 상부에 형성하고, 이 그린시트를 적층 및 소성하여 신뢰성이 우수한 인덕터가 내장된 세라믹 적층 소자를 제조함으로써, 고주파 모듈의 적용시 모듈의 신뢰성을 향상시킬 수 있는 효과가 발생한다. 더불어, 사진식각 공정으로 선폭이 작은 인덕터를 형성할 수 있어, 내장형 인덕터를 갖는 세라믹 적층 소자 및 고주파 모듈을 소형화시킬 수 있는 효과가 발생한다.
Abstract:
PURPOSE: A VCO(Voltage Controlled Oscillator) of a dual band mobile terminal is provided to minimize a module so as to have a smaller size than an existing switching device by fabricating the module three-dimensionally. CONSTITUTION: A stack board(200) is formed as a plurality of dielectric boards each with a certain electrode pattern printed thereon are disposed and stacked in a vertical direction according to each stacking type unit element and the circuit disposition pattern of two individual VCOs. Surface-mounted unit elements(301-307) are surface-mounted on the electric pattern of the uppermost dielectric board of the stack board(200). Conductor pads(401-411) are formed from a portion of the side of the uppermost dielectric board to the lowermost dielectric board of the stack board(200) in a vertical direction and electrically connect the stack board(200) and the surface-mounted unit elements(301-307) mutually or connect them with outside.
Abstract:
PURPOSE: A stacking switch module used for a dual-band mobile communication terminal is provided to form switching-related unit elements in 3-dimensional structure by stacking and integrating ceramic sheets, thereby reducing a chip part cost and a mounting cost. CONSTITUTION: A switching stack substrate(200) is formed with switching unit elements for switching the first and second communication frequencies having different dual bands and patterns of the switching unit elements, by ceramic sheets which are disposed and stacked in vertical direction while being electrically united together. Surface mounting unit elements(301-308) are mounted on an upper side of the switching stack substrate(200). Conductor walls(401-412) are formed in vertical direction at certain spots on 4 sides of the switching stack substrate(200), and electrically connect the switching unit elements with the surface mounting unit elements(301-308) or with the exterior.
Abstract:
PURPOSE: A photosensitive paste composition and a method for forming a micro line using the composition are provided, to obtain the clean edge of micro line and to improve the characteristic of micro line having via hole by optimizing the ratio of a photoinitiator and a photosensitive monomer. CONSTITUTION: The photosensitive paste composition comprises 25-40 wt% of alumina and aluminate powder; 25-40 wt% of glass frit; 10-30 wt% of a primary monomer containing an acid pendent novolac epoxy acrylate as a main component; 5-10 wt% of a secondary monomer containing a carboxy polyester acrylate as a main component; 0.1-3 wt% of a photoinitiator; 0.1-0.5 wt% of a lubricant; and 0.1-25 wt% of a solvent. Preferably the ratio of the mixture of the primary and secondary monomers and the photoinitiator is 29:3 by weight. The method comprises the steps of screen printing the photosensitive paste composition; drying the screen printed photosensitive dielectric paste; putting a mask where the micro line is formed on the dried paste and exposing it; and removing the mask and etching the exposed paste to form the micro line.
Abstract:
PURPOSE: A packaging device of a high frequency communication module and a manufacturing method thereof are provided to reduce high frequency parasitic inductance caused by a bonding wire by forming parallel capacitance using a double metal film structure under a feeding line. CONSTITUTION: A first sheet structure(13) with a pair of first metal terminals(12) is provided. A second sheet structure(23) with a pair of second metal terminals(22) is formed on the first sheet structure. A third sheet structure(33) with a feeding line(32) is formed on the second sheet structure. At this time, a double metal film structure made of the first and second metal terminals is completed under the feeding line. A fourth sheet structure(43) is formed on the third sheet structure. The first to fourth sheet structure are ceramic green sheets.