CN103956380A - 一种igbt芯片及其制造方法 - Google Patents

一种igbt芯片及其制造方法 Download PDF

Info

Publication number
CN103956380A
CN103956380A CN201410210503.1A CN201410210503A CN103956380A CN 103956380 A CN103956380 A CN 103956380A CN 201410210503 A CN201410210503 A CN 201410210503A CN 103956380 A CN103956380 A CN 103956380A
Authority
CN
China
Prior art keywords
igbt chip
insulating barrier
type substrate
layer
igbt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410210503.1A
Other languages
English (en)
Inventor
吕新立
薛涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zibo Micro Commerical Components Corp
Original Assignee
Zibo Micro Commerical Components Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zibo Micro Commerical Components Corp filed Critical Zibo Micro Commerical Components Corp
Priority to CN201410210503.1A priority Critical patent/CN103956380A/zh
Publication of CN103956380A publication Critical patent/CN103956380A/zh
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof  ; Multistep manufacturing processes therefor
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
    • H01L29/70Bipolar devices
    • H01L29/72Transistor-type devices, i.e. able to continuously respond to applied control signals
    • H01L29/739Transistor-type devices, i.e. able to continuously respond to applied control signals controlled by field-effect, e.g. bipolar static induction transistors [BSIT]
    • H01L29/7393Insulated gate bipolar mode transistors, i.e. IGBT; IGT; COMFET
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof  ; Multistep manufacturing processes therefor
    • H01L29/02Semiconductor bodies ; Multistep manufacturing processes therefor
    • H01L29/06Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
    • H01L29/0603Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
    • H01L29/0642Isolation within the component, i.e. internal isolation
    • H01L29/0649Dielectric regions, e.g. SiO2 regions, air gaps
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof  ; Multistep manufacturing processes therefor
    • H01L29/40Electrodes ; Multistep manufacturing processes therefor
    • H01L29/401Multistep manufacturing processes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof  ; Multistep manufacturing processes therefor
    • H01L29/40Electrodes ; Multistep manufacturing processes therefor
    • H01L29/41Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
    • H01L29/417Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
    • H01L29/41708Emitter or collector electrodes for bipolar transistors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof  ; Multistep manufacturing processes therefor
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/66007Multistep manufacturing processes
    • H01L29/66075Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
    • H01L29/66227Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
    • H01L29/66234Bipolar junction transistors [BJT]
    • H01L29/66325Bipolar junction transistors [BJT] controlled by field-effect, e.g. insulated gate bipolar transistors [IGBT]

Abstract

一种IGBT芯片及其制造方法,属于半导体器件制造领域。包括P型基片(2)、P型基片(2)上方的N型外延层(1)、N型漂移层(4)、金属层(3),其特征在于:在IGBT芯片外侧纵向设置有填充了绝缘层的绝缘沟槽。包括以下步骤:制造IGBT芯片;在IGBT芯片的一侧刻蚀出绝缘沟槽;在绝缘沟槽内填充第一绝缘层(5);在第一绝缘层外侧填充与P型基片(2)接触的导电层(6);在IGBT底部填充第二绝缘层(7);自IGBT顶部将门极、集电极、发射极引出。本发明的IGBT芯片的发射极、集电极、门极从同一平面引出,提高了产品的可靠性。

Description

一种IGBT芯片及其制造方法
技术领域
一种IGBT芯片及其制造方法,属于半导体器件制造领域。
背景技术
如图3所示,传统的IGBT芯片结构包括以下几部分:位于最底层的P型基片2、P型基片2上方的N型外延层1,N型外延层1上方的N型漂移层以及最上方的金属层3。在图3所示的传统的IGBT芯片中,IGBT芯片的门极和发射极自IGBT芯片的上方引出,集电极自底部的P型基片2引出,即门极和发射极与集电极不在同一平面。
同时由于现有技术中的IGBT芯片门极和发射极与集电极不在同一平面,在进行芯片封装时要两端引出电极,从而造成了封装工艺复杂,可靠性难以保障,同时在一定程度上增加了产品的厚度。
发明内容
本发明要解决的技术问题是:克服现有技术的不足,提供一种降低了产品厚度的IGBT芯片以及便于封装的IGBT芯片的制造方法。
本发明解决其技术问题所采用的技术方案是:该IGBT芯片,包括P型基片、P型基片上方的N型外延层、N型漂移层以及顶层的金属层,其特征在于:在IGBT芯片外侧纵向设置有向下延伸至P型基片的绝缘沟槽,绝缘沟槽内填充有绝缘层。
在所述的绝缘层的外侧设置有一个或多个导电沟槽,导电沟槽内填充有与所述P型基片接触的导电层。
在所述的P型基片下方设置有第二绝缘层。
所述的绝缘层为第一绝缘层。
一种IGBT芯片的制造方法,其特征在于,包括如下步骤:
步骤1:制造IGBT芯片;
步骤2:在IGBT芯片的一侧刻蚀出绝缘沟槽;
步骤3:在绝缘沟槽内填充第一绝缘层;
步骤4:在第一绝缘层外侧填充与P型基片接触的导电层;
步骤5:在IGBT底部填充第二绝缘层;
步骤6:自IGBT顶层将门极、集电极、发射极引出。
与现有技术相比,本发明所具有的有益效果是:
1、本发明的IGBT芯片的发射极、集电极、门极从同一平面引出,提高了产品的可靠性。
2、降低了产品封装时的厚度,方便焊接。
3、在IGBT芯片底部设置第二绝缘层可以使IGBT芯片底部绝缘,从而封装时可以直接焊到散热底板上,省去陶瓷覆铜板,提高散热效果。
附图说明
图1为本IGBT芯片结构示意图。
图2为本IGBT芯片制造方法流程图。
图3为传统IGBT芯片结构示意图。
其中:1、N型外延层  2、P型基片  3、金属层  4、N型漂移层  5、第一绝缘层  6、导电层  7、第二绝缘层。
具体实施方式
图1~2是本发明的最佳实施例,下面结合附图1~3对本发明做进一步说明。
如图1所示,本IGBT芯片在传统IGBT芯片外侧开有纵向延伸至P型基片2的沟槽,在沟槽内填充有第一绝缘层5,第一绝缘层5为氧化硅绝缘层。通过第一绝缘层5实现其内侧的IGBT芯片与其外侧绝缘,在第一绝缘层5外侧设置有一个导电沟槽,在导电沟槽内填充有与P型基片2接触的导电层6。
本IGBT芯片的结构为:自下往上底部的第二绝缘层7、第二绝缘层7上方依次为:P型基片2、N型外延层1、N型漂移层4以及顶层的金属层3,IGBT芯片的门极、集电极、发射极全部从IGBT芯片顶部同一个平面上引出。
本设计由于IGBT芯片的发射极、集电极、门极从同一平面引出,提高了产品的可靠性。降低了产品封装时的厚度,方便焊接。
根据设计需要第一绝缘层5外侧设置1个或多个导电沟槽。主要作用是通过其内填充的导电层6,将P型基片2和顶层的金属层3实现导电,最终实现将发射极、集电极、门极从同一平面引出。
如图2所示,本IGBT芯片制造方法,包括如下步骤:
步骤1:按照传统工艺制造IGBT芯片;
按照传统工艺制造处如图3所示的传统结构的IGBT芯片。
步骤2:在传统IGBT芯片的一侧刻蚀出绝缘沟槽;
如图1所示,在传统IGBT芯片的一侧通过腐蚀或穿刺等方式竖直刻蚀出绝缘沟槽,该绝缘沟槽向下依次穿过金属层3、N型漂移层4、N型外延层1,并延伸至N型外延层1下方的P型基片2中。
步骤3:在绝缘沟槽内填充第一绝缘层5;
第一绝缘层5为氧化硅绝缘层。
步骤4:在第一绝缘层外侧填充与P型基片2接触的导电层6;
在绝缘层外侧刻蚀出一个或多个导电沟槽,并在导电沟槽内填充与P型基片2接触的导电层6。导电层6 可以使用金属实现,如铝。也可以通过其他导体实现。
步骤5:在IGBT底部填充第二绝缘层7;
步骤6:自IGBT顶部将门极、集电极、发射极引出。
在传统工艺生产的IGBT芯片中,IGBT芯片的集电极自P型基片2处引出,在本发明中,通过设置与P型基片2接触的导电层6和将导电层6与P型基片2绝缘的第一绝缘层5,使得IGBT芯片的集电极可通过导电层6与发射极和门极同时自IGBT芯片的上部引出。同时在IGBT芯片底部设置第二绝缘层7可以使IGBT芯片底部绝缘,从而在封装时可以通过胶粘等方式将IGBT芯片直接固定到散热底板上,省去陶瓷覆铜板,提高散热效果。 
以上所述,仅是本发明的较佳实施例而已,并非是对本发明作其它形式的限制,任何熟悉本专业的技术人员可能利用上述揭示的技术内容加以变更或改型为等同变化的等效实施例。但是凡是未脱离本发明技术方案内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与改型,仍属于本发明技术方案的保护范围。

Claims (5)

1.一种IGBT芯片,包括P型基片(2)、P型基片(2)上方的N型外延层(1)、N型漂移层(4)以及顶层的金属层(3),其特征在于:在IGBT芯片外侧纵向设置有向下延伸至P型基片(2)的绝缘沟槽,绝缘沟槽内填充有绝缘层。
2.根据权利要求1所述的IGBT芯片,其特征在于:在所述的绝缘层的外侧设置有一个或多个导电沟槽,导电沟槽内填充有与所述P型基片(2)接触的导电层(6)。
3. 根据权利要求1或2所述的IGBT芯片,其特征在于:在所述的P型基片(2)下方设置有第二绝缘层(7)。
4. 根据权利要求1或2所述的IGBT芯片,其特征在于:所述的绝缘层为第一绝缘层(5)。
5.实现权利要求1~4任一项所述的IGBT芯片的制造方法,其特征在于,包括如下步骤:
步骤1:制造IGBT芯片;
步骤2:在IGBT芯片的一侧刻蚀出绝缘沟槽;
步骤3:在绝缘沟槽内填充第一绝缘层(5);
步骤4:在第一绝缘层外侧填充与P型基片(2)接触的导电层(6);
步骤5:在IGBT底部填充第二绝缘层(7);
步骤6:自IGBT顶层将门极、集电极、发射极引出。
CN201410210503.1A 2014-05-19 2014-05-19 一种igbt芯片及其制造方法 Pending CN103956380A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410210503.1A CN103956380A (zh) 2014-05-19 2014-05-19 一种igbt芯片及其制造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410210503.1A CN103956380A (zh) 2014-05-19 2014-05-19 一种igbt芯片及其制造方法

Publications (1)

Publication Number Publication Date
CN103956380A true CN103956380A (zh) 2014-07-30

Family

ID=51333631

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410210503.1A Pending CN103956380A (zh) 2014-05-19 2014-05-19 一种igbt芯片及其制造方法

Country Status (1)

Country Link
CN (1) CN103956380A (zh)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090057710A1 (en) * 2007-08-30 2009-03-05 Sang Yong Lee Insulated Gate Bipolar Transistor and Method for Manufacturing the Same
CN102969358A (zh) * 2012-12-06 2013-03-13 电子科技大学 一种横向高压功率半导体器件
CN103745962A (zh) * 2013-12-19 2014-04-23 联合汽车电子有限公司 适用于电动汽车逆变器的igbt模块及封装方法和使用方法
CN203850304U (zh) * 2014-05-19 2014-09-24 淄博美林电子有限公司 一种igbt芯片

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090057710A1 (en) * 2007-08-30 2009-03-05 Sang Yong Lee Insulated Gate Bipolar Transistor and Method for Manufacturing the Same
CN102969358A (zh) * 2012-12-06 2013-03-13 电子科技大学 一种横向高压功率半导体器件
CN103745962A (zh) * 2013-12-19 2014-04-23 联合汽车电子有限公司 适用于电动汽车逆变器的igbt模块及封装方法和使用方法
CN203850304U (zh) * 2014-05-19 2014-09-24 淄博美林电子有限公司 一种igbt芯片

Similar Documents

Publication Publication Date Title
CN103413765B (zh) 沟槽mosfet器件及其制作方法
CN102683403A (zh) 一种沟槽栅电荷存储型igbt
CN103794647A (zh) 一种双向igbt器件及其制作方法
CN103985746B (zh) 沟槽型igbt器件及其制造方法
CN107658340A (zh) 一种双沟槽的低导通电阻、小栅电荷的碳化硅mosfet器件与制备方法
CN104319287A (zh) 一种沟槽栅型半导体器件结构及其制作方法
CN204130542U (zh) 功率半导体器件
CN103268860A (zh) 一种集成有二极管的igbt器件的制造方法
CN203850304U (zh) 一种igbt芯片
CN103879951B (zh) 硅通孔的制作方法
CN103956380A (zh) 一种igbt芯片及其制造方法
JP6127820B2 (ja) 半導体装置
CN105355656A (zh) 能降低米勒电容的超结igbt器件
CN204011433U (zh) 功率半导体器件
CN204011430U (zh) 半导体器件
CN102956783B (zh) 半导体芯片、半导体发光器件及其制作方法
CN204067367U (zh) 功率半导体器件
CN203179895U (zh) 一种具有场截止结构的igbt
CN201868416U (zh) 一种功率半导体器件封装结构
CN102651359B (zh) 具有低阻值基材与低功率损耗的半导体结构
CN105932143A (zh) 一种倒装led芯片的制造方法
CN111341843A (zh) 复合沟道igbt器件及其制造方法
US20150187918A1 (en) Power semiconductor device
CN104966714B (zh) Igbt芯片的控制方法
CN105514154B (zh) 改善有源区与终端连接区场强均匀性的igbt器件及制造方法

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20140730

WD01 Invention patent application deemed withdrawn after publication