KR970018672A - Substrate Structure of Semiconductor Switching Device and Manufacturing Method Thereof - Google Patents

Substrate Structure of Semiconductor Switching Device and Manufacturing Method Thereof Download PDF

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Publication number
KR970018672A
KR970018672A KR1019950031388A KR19950031388A KR970018672A KR 970018672 A KR970018672 A KR 970018672A KR 1019950031388 A KR1019950031388 A KR 1019950031388A KR 19950031388 A KR19950031388 A KR 19950031388A KR 970018672 A KR970018672 A KR 970018672A
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South Korea
Prior art keywords
conductive
layer
type
epitaxial layer
semiconductor switching
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KR1019950031388A
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Korean (ko)
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박재홍
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김광호
삼성전자 주식회사
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Priority to KR1019950031388A priority Critical patent/KR970018672A/en
Publication of KR970018672A publication Critical patent/KR970018672A/en

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Abstract

본 발명은 반도체 스위칭 소자의 제작에 있어서 금 도우핑에 따른 스위칭 소자의 소자 특성이 열화되는 것을 방지하기 위한 것으로, 고농도의 N+형의 기판(8) 위에 P+형의 영역들(7)을 부분적으로 형성하고 N형 및 N-형의 에피택셜층(6, 5)을 순차로 형성한 후, 기판의 뒷면으로 금을 도우핑함으로써, 펀치쓰루 브레이크 다운 전압을 유도하여 파형을 안정화시키고 누설전류를 감소시키며 실리콘-산화물의 계면에 금의 침투가 생기지 않아 소자의 신뢰성을 높일 수 있게 된다.The present invention is to prevent the deterioration of the device characteristics of the switching device due to the gold doping in the fabrication of a semiconductor switching device, and partially to the P + type regions 7 on the high concentration N + type substrate (8) By forming the N-type and N-type epitaxial layers 6 and 5 sequentially, and then doping gold to the back side of the substrate to induce punch-through breakdown voltage to stabilize the waveform and reduce leakage current. In addition, gold does not penetrate the silicon-oxide interface, thereby increasing the reliability of the device.

Description

반도체 스위칭 소자의 기판구조 및 그 제조방법Substrate Structure of Semiconductor Switching Device and Manufacturing Method Thereof

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3A도 내지 제3E도는 본 발명에 따른 실리콘기판의 제조방법을 공정순서대로 나타낸 단면도3A to 3E are cross-sectional views showing a method for manufacturing a silicon substrate according to the present invention in the order of process.

Claims (5)

고농도의 제1전도대(8)와 제2전도대(7)가 소정의 간격으로 교대로 형성되어 있는 전도층과, 상기 전도층 위에 농도차이를 갖도록 순차로 형성된 제1 및 제2에피택셜층(6, 5)으로 구성되는 반도체 스위칭 소자의 기판구조.Highly conductive first and second conductive bands 8 and 7 are formed alternately at predetermined intervals, and first and second epitaxial layers 6 sequentially formed to have a difference in concentration on the conductive layer. , 5) a substrate structure of a semiconductor switching element. 제1항에 있어서, 상기 제1전도대(8) 및 상기 제2전도대(7) 중 어느 하나는 N+형으로 형성되고, 다른 하나는 P+형으로 형성되며, 상기 제1에피택셜층(6)은 N층, 상기 제2에피택셜층(5)은 N-층으로 각각 형성되는 반도체 스위칭 소자의 기판 구조The method of claim 1, wherein any one of the first conductive band 8 and the second conductive band 7 is formed of an N + type, the other is formed of a P + type, the first epitaxial layer 6 is N-layer, the second epitaxial layer 5 is a substrate structure of a semiconductor switching element each formed of an N- layer 제1항에 있어서, 상기 제1전도대(7) 및 상기 제2전도대(6)는 각각 1018atom/㎤ 이상의 농도를 갖고, 상기 제1에피택셜층(6)은 1015~1017atom/㎤, 상기 제2에피택셜층(5)은 1015atom/㎤ 이하의 농도를 갖는 반도체 스위칭 소자의 기판 구조The method of claim 1, wherein the first conductive band (7) and the second conductive band (6) each have a concentration of 10 18 atom / cm 3 or more, the first epitaxial layer (6) is 10 15 ~ 10 17 atom / Cm 3, the second epitaxial layer 5 has a substrate structure of a semiconductor switching element having a concentration of 10 15 atoms / cm 3 or less. 고농도의 제1도전형의 전도층 위에, 마스크(11)를 씌우고 상기 전도층으로 제2전도형의 불순물을 주입하고 열처리하여, 제1도전형의 제1전도대(8)와 제2도전형의 제2전도대(7)를 소정의 간격으로 교대로 형성하는 단계와; 상기 전도층 위에 상기 전도층의 농도보다 상대적으로 낮은 농도의 제1도전형의 제1에피택셜층(6)과, 이 제1에피택셜층(6) 보다 상대적으로 낮은 농도의 제1도전형의 제2에피택셜층(5)을 순차로 형성하여 이중 에피택셜 웨이터를 제작하는 단계와; 상기 전도층의 표면 위에 금을 중착하고, 웨이퍼를 가열한 후, 표면에 남아있는 금을 제거하는 단계와; 웨이퍼의 뒷면에 스며든 금을 상기 제2에피택셜층(5)으로 확산시키는 단계를 포함하는 반도체 스위칭 소자의 기판 그 제조방법On the conductive layer of the first conductive type having a high concentration, a mask 11 is put on, and the second conductive type impurity is injected into the conductive layer and heat treated, so that the first conductive band 8 of the first conductive type and the second conductive type are heated. Alternately forming second conductive bands (7) at predetermined intervals; A first epitaxial layer 6 having a first conductivity type at a concentration lower than that of the conductive layer on the conductive layer and a first conductive type having a lower concentration than the first epitaxial layer 6 Forming a second epitaxial layer 5 in sequence to produce a double epitaxial waiter; Depositing gold on the surface of the conductive layer, heating the wafer, and then removing the gold remaining on the surface; A method of manufacturing a substrate of a semiconductor switching device comprising the step of diffusing the gold impregnated on the back side of the wafer into the second epitaxial layer (5) 제4항에 있어서, 상기 제1전도대(8)는 N+층으로 이루어지고, 상기 제2전도대(7)는 P+층으로 이루어지며, 상기 제1에피택셜층(6)과 상기 제2에피택셜층(5)은 각각 N층과 N-층으로 이루어지는 반도체 스위칭 소자의 기판 구조 및 그 제조방법The method of claim 4, wherein the first conductive band 8 is formed of an N + layer, the second conductive band 7 is formed of a P + layer, and the first epitaxial layer 6 and the second epitaxial layer are formed. (5) shows a substrate structure of a semiconductor switching element consisting of N layers and N-layers and a method of manufacturing the
KR1019950031388A 1995-09-22 1995-09-22 Substrate Structure of Semiconductor Switching Device and Manufacturing Method Thereof KR970018672A (en)

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