WO2001020683A1 - Semiconductor device - Google Patents
Semiconductor device Download PDFInfo
- Publication number
- WO2001020683A1 WO2001020683A1 PCT/JP2000/006035 JP0006035W WO0120683A1 WO 2001020683 A1 WO2001020683 A1 WO 2001020683A1 JP 0006035 W JP0006035 W JP 0006035W WO 0120683 A1 WO0120683 A1 WO 0120683A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- region
- conductivity type
- base
- type semiconductor
- semiconductor device
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D10/00—Bipolar junction transistors [BJT]
- H10D10/40—Vertical BJTs
- H10D10/421—Vertical BJTs having both emitter-base and base-collector junctions ending at the same surface of the body
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/13—Semiconductor regions connected to electrodes carrying current to be rectified, amplified or switched, e.g. source or drain regions
- H10D62/133—Emitter regions of BJTs
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/17—Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
- H10D62/177—Base regions of bipolar transistors, e.g. BJTs or IGBTs
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
- H10D84/101—Integrated devices comprising main components and built-in components, e.g. IGBT having built-in freewheel diode
- H10D84/121—BJTs having built-in components
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/90—Bond pads, in general
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/90—Bond pads, in general
- H10W72/981—Auxiliary members, e.g. spacers
- H10W72/983—Reinforcing structures, e.g. collars
Definitions
- the present invention relates to a semiconductor device including a functional element having a PN junction.
- a P-type base region 92 is formed in the surface layer portion of the N-type semiconductor substrate 91, and an N-type emitter region 93 is formed in the P-type base region 92.
- a base electrode 94 and an emitter electrode 95 are joined to the base region 92 and the emitter region 93, respectively.
- the collector electrode is joined to an N + -type region 96 formed on the back side of the N-type semiconductor substrate 91.
- Reference numeral 97 denotes an insulating film.
- Base region 92 is formed by doping a P-type impurity from the surface of N-type semiconductor substrate 91.
- the impurity concentration of the base region 92 becomes higher toward the surface side, and the base-to-emissive current flows intensively near the surface of the base region 92. Therefore, power destruction due to heat generation due to power consumption is more likely to occur near the surface of the base region 92 than in other portions of the base region 92. This has caused a decrease in the electrostatic breakdown withstand capability, the inductive load withstand capability, and the resistive load withstand capability of the entire bipolar transistor. Disclosure of the invention
- An object of the present invention is to provide a semiconductor device that can suppress power destruction.
- a semiconductor device according to the present invention includes a first conductivity type semiconductor region formed on a semiconductor substrate, and a second conductivity type semiconductor region formed to be bonded to the first conductivity type semiconductor region and having a different conductivity type from the first conductivity type semiconductor region.
- a diode is formed at the boundary of the contact region to which the electrode is connected in the first conductivity type semiconductor region.
- the diode is formed at the boundary of the contact region. 1
- power destruction near the surface of the first semiconductor region can be suppressed, and the breakdown strength can be improved.
- the diode has a conductivity type different from the first conductivity type semiconductor region embedded in the first conductivity type semiconductor region in a state of being in contact with the boundary between the first conductivity type semiconductor region and the contact region.
- a PN diode comprising the second conductivity type region may be used. In this case, most of the majority carriers in the first conductivity type semiconductor region move from the electrode connected to the first conductivity type semiconductor region to the second conductivity type semiconductor region, avoiding the second conductivity type region.
- the functional element is an NPN-type bipolar transistor
- most of the base current flowing through the P-type base region as the first conductivity type semiconductor region is formed in the N-type region as the second conductivity type region. It flows toward the emitter region as the second conductivity type semiconductor region, avoiding the surface of the base region.
- a part of the N-type region is in contact with the base electrode, a small number of carriers (electrons) remaining in the base region can be drawn into the N-type region during switching operation.
- a high-concentration impurity region having the same conductivity type as the first conductivity type semiconductor region may be formed in contact with the electrode.
- the diode may be a Schottky diode formed by forming a Schottky junction between the electrode connected to the contact region and the first conductivity type semiconductor region.
- most of the majority carriers of the first conductivity type semiconductor region pass through the high concentration region from the electrode connected to the first conductivity type semiconductor region, and are dispersed from the high concentration region to be dispersed in the second conductivity type semiconductor region. Move towards.
- the functional element is an NPN bipolar transistor
- most of the base current flowing through the P-type base region as the first conductivity type semiconductor region passes through the P + -type region, which is a high concentration region, and this P +
- the light is dispersed from the mold region and moves toward the emitter region as the second conductivity type semiconductor region.
- This allows the base current to Disperse in the area and flow toward the Emi evening area. Therefore, it is possible to prevent a current from flowing intensively on the surface of the base region, and as a result, it is possible to suppress power destruction near the surface of the base region.
- a small number of carriers (electrons) remaining in the base region are quickly released via the Schottky junction. Thereby, the accumulation of minority carriers in the base region can be suppressed, and the switching operation can be performed at high speed.
- FIG. 1 is a sectional view showing a structure of a bipolar transistor according to one embodiment of the present invention.
- FIG. 2 is a plan view showing a configuration of a surface of the semiconductor device having the bipolar transistor.
- FIGS. 3A and 3B are diagrams showing the results of the electrostatic breakdown inspection of the bipolar transistor of this embodiment and the conventional bipolar transistor.
- FIG. 4 is a cross-sectional view showing a configuration of a bipolar transistor according to another embodiment of the present invention.
- FIG. 5 is a sectional view showing a configuration of a bipolar transistor according to still another embodiment of the present invention.
- FIG. 6 is a plan view for explaining a modification of the above embodiment.
- FIG. 7 is a cross-sectional view showing the structure of a conventional bipolar transistor.
- FIG. 1 is a sectional view showing a structure of a bipolar transistor according to one embodiment of the present invention.
- FIG. 2 shows a semiconductor device having the above bipolar transistor. It is a top view which shows the structure of a surface.
- a P-type base region 12 is formed on the surface of the N-type semiconductor substrate 11, and an N-type emitter region 13 is formed in the P-type base region 12.
- NPN structure is formed, and N-type semiconductor substrate 11 forms a collector region.
- a base contact region 14 is set in a substantially C-shaped plane, and in this base contact region 14, a base electrode 15 is joined to the base region 12. I have.
- an Emi-Electrode electrode 16 is joined to the Emi-Eye region 13.
- the base electrode 15 and the emitter electrode 16 are exposed through openings 18 and 19 formed in the insulating film 17 respectively, and the base wire and the emitter wire (see FIG. (Not shown) is bonded to achieve an external electrical connection.
- the collector electrode is joined to an N + -type region 20 formed on the back side of the semiconductor substrate 11.
- N-type region 21 having the same conductivity type as emitter region 13 is formed so as to surround base contact region 14 over the entire circumference.
- a PN-type diode is formed at the boundary between the base contact region 14 and the P-type base region 12 and the N-type region 21, a PN-type diode is formed at the boundary between the base contact region 14 and the P-type base region 12 and the N-type region 21, a PN-type diode is formed.
- the N-type region 21 is indicated by hatching.
- 3A and 3B show a bipolar transistor of this embodiment and a conventional transistor. It is a figure which shows the result of an electrostatic breakdown inspection of a bipolar transistor.
- a capacitor for example, 200 pF
- a resistor for example, lk ⁇
- the charge was discharged and current was applied between the collector (C) and the base (B) and between the base (B) and the emitter (E).
- the number of elements destroyed by this inspection was counted.
- Fig. 3A shows the relationship between the base-emitter voltage (voltage applied to the capacitor) and the number of destructions when a forward bias was applied during the base-emitter period. .
- Figure 3B shows the relationship between the base-emitter voltage and the number of destructions when a reverse bias was applied during the base-emmit evening.
- the results for the bipolar transistor of this embodiment are shown by solid lines, and the results for the conventional bipolar transistor are shown by broken lines.
- the bipolar transistor of this embodiment can be used regardless of whether a forward bias is applied between the base and the emitter or a reverse bias is applied between the base and the emitter. It can be seen that the lowest base emission voltage (breakdown voltage) that causes electrostatic breakdown is about 1.5 times the breakdown voltage of a conventional bipolar transistor. That is, it is understood that the bipolar transistor according to this embodiment has a higher breakdown strength than the conventional bipolar transistor.
- FIG. 4 is a cross-sectional view showing a configuration of a bipolar transistor according to another embodiment of the present invention.
- portions corresponding to the respective portions in FIG. 1 described above are denoted by the same reference numerals as in FIG.
- a P + type region 22 narrower than the base contact region 14 is formed at the center of the base contact region 14.
- a Schottky junction is formed between the base electrode 15 and the P type base region 12. The Schottky junction forms the base contact region 1.
- a Schottky diode is formed at the boundary of 4.
- FIG. 5 is a sectional view showing a configuration of a bipolar transistor according to still another embodiment of the present invention. Also in FIG. 5, parts corresponding to the respective parts in FIG. 1 described above are denoted by the same reference numerals as in FIG.
- an N + type region 23 having a small width is provided at the boundary of the base contact region 14 so as to surround the base contact region 14.
- the P + -type regions 24 with a small width and the N + -type regions 25 with a small width are alternately arranged. That is, a universal contact structure is formed in the base contact region 14.
- the base contact region 14 is set in a substantially C-shaped plane, but as shown in FIG. 6, the base contact region 14 is formed in a ring shape surrounding the emitter region 13. 14 may be set. Further, the N-type region 21 and the N + -type region 23 do not necessarily need to be formed all around the boundary of the base contact region 14. For example, as shown in FIG. 6, when a base wire (not shown) is bonded to a bonding region 26 set on the surface of the base electrode 15, the N-type region 21 and the N + type region 23 are bonded to each other.
- N-type region 21 and N + -type region 23 may be formed only on the side near the emitter region 13 at the boundary of base contact region 14.
- an NPN-type bipolar transistor is taken as an example, but the present invention can be applied to a PNP-type bipolar transistor.
- a P-type region or a P + -type region having the same conductivity type as the emission region is provided at the boundary of the base contact region set in the N-type base region, or the center of the base contact region is provided.
- a P + type region narrower than the base contact region may be provided in the portion.
- a semiconductor device having one bipolar transistor is taken as an example, but the present invention can be applied to a semiconductor device having a plurality of bipolar transistors. Further, the present invention can be applied to a semiconductor device including a functional element having a PN junction other than a bipolar transistor, such as a thyristor, a triac or a GTO (gate turn-off thyristor).
- a functional element having a PN junction other than a bipolar transistor such as a thyristor, a triac or a GTO (gate turn-off thyristor).
Landscapes
- Bipolar Transistors (AREA)
- Electrodes Of Semiconductors (AREA)
- Thyristors (AREA)
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/070,536 US6897546B1 (en) | 1999-09-09 | 2000-09-06 | Semiconductor device including a functional element having a PN junction |
| EP00956947A EP1211733A4 (en) | 1999-09-09 | 2000-09-06 | SEMICONDUCTOR COMPONENT |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11/255881 | 1999-09-09 | ||
| JP25588199A JP4707203B2 (ja) | 1999-09-09 | 1999-09-09 | 半導体装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001020683A1 true WO2001020683A1 (en) | 2001-03-22 |
Family
ID=17284869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2000/006035 Ceased WO2001020683A1 (en) | 1999-09-09 | 2000-09-06 | Semiconductor device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6897546B1 (ja) |
| EP (1) | EP1211733A4 (ja) |
| JP (1) | JP4707203B2 (ja) |
| TW (1) | TW479361B (ja) |
| WO (1) | WO2001020683A1 (ja) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6815800B2 (en) * | 2002-12-09 | 2004-11-09 | Micrel, Inc. | Bipolar junction transistor with reduced parasitic bipolar conduction |
| JP2010034312A (ja) * | 2008-07-29 | 2010-02-12 | Rohm Co Ltd | 半導体装置およびその製造方法 |
| JP5750723B2 (ja) | 2011-03-28 | 2015-07-22 | 国立研究開発法人産業技術総合研究所 | 半導体デバイスの増幅率の電流変化に対する変化の抑制方法、光電変換素子および半導体デバイスの製造方法 |
| FR3036001A1 (fr) * | 2015-05-05 | 2016-11-11 | St Microelectronics Tours Sas | Commutateur bidirectionnel de puissance |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5858361U (ja) * | 1981-10-16 | 1983-04-20 | オリジン電気株式会社 | 半導体装置 |
| JPS5866356A (ja) | 1981-10-16 | 1983-04-20 | Origin Electric Co Ltd | 可制御型半導体装置 |
| JPS6258678A (ja) * | 1985-09-06 | 1987-03-14 | Matsushita Electronics Corp | トランジスタ |
| US5432360A (en) | 1993-02-24 | 1995-07-11 | Samsung Electronics Co., Ltd. | Semiconductor device including an anode layer having low density regions by selective diffusion |
| US5545914A (en) | 1993-10-27 | 1996-08-13 | Rohm Co., Ltd | Semiconductor device having zener diodes with temperature stability between base and collector regions |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3858234A (en) * | 1973-01-08 | 1974-12-31 | Motorola Inc | Transistor having improved safe operating area |
| JPS61166170A (ja) * | 1985-01-18 | 1986-07-26 | Matsushita Electronics Corp | 半導体集積回路 |
| JPS628565A (ja) * | 1985-07-04 | 1987-01-16 | Nec Corp | 半導体装置 |
| US4933740A (en) * | 1986-11-26 | 1990-06-12 | General Electric Company | Insulated gate transistor with vertical integral diode and method of fabrication |
| US4871686A (en) * | 1988-03-28 | 1989-10-03 | Motorola, Inc. | Integrated Schottky diode and transistor |
| JPH01169048U (ja) * | 1988-05-19 | 1989-11-29 | ||
| JPH02222541A (ja) * | 1989-02-23 | 1990-09-05 | Nec Corp | バイポーラトランジスタ |
| JPH04275432A (ja) * | 1991-03-04 | 1992-10-01 | Matsushita Electron Corp | 半導体装置 |
| JP2503130B2 (ja) * | 1991-07-29 | 1996-06-05 | 信越半導体株式会社 | 液相成長方法 |
| EP0720237A1 (en) * | 1994-12-30 | 1996-07-03 | STMicroelectronics S.r.l. | Zener diode for integrated circuits |
-
1999
- 1999-09-09 JP JP25588199A patent/JP4707203B2/ja not_active Expired - Lifetime
-
2000
- 2000-09-06 EP EP00956947A patent/EP1211733A4/en not_active Withdrawn
- 2000-09-06 US US10/070,536 patent/US6897546B1/en not_active Expired - Lifetime
- 2000-09-06 WO PCT/JP2000/006035 patent/WO2001020683A1/ja not_active Ceased
- 2000-09-08 TW TW089118445A patent/TW479361B/zh not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5858361U (ja) * | 1981-10-16 | 1983-04-20 | オリジン電気株式会社 | 半導体装置 |
| JPS5866356A (ja) | 1981-10-16 | 1983-04-20 | Origin Electric Co Ltd | 可制御型半導体装置 |
| JPS6258678A (ja) * | 1985-09-06 | 1987-03-14 | Matsushita Electronics Corp | トランジスタ |
| US5432360A (en) | 1993-02-24 | 1995-07-11 | Samsung Electronics Co., Ltd. | Semiconductor device including an anode layer having low density regions by selective diffusion |
| JPH07312370A (ja) * | 1993-02-24 | 1995-11-28 | Samsung Electron Co Ltd | 半導体装置 |
| US5545914A (en) | 1993-10-27 | 1996-08-13 | Rohm Co., Ltd | Semiconductor device having zener diodes with temperature stability between base and collector regions |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1211733A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001085443A (ja) | 2001-03-30 |
| EP1211733A1 (en) | 2002-06-05 |
| EP1211733A4 (en) | 2007-01-17 |
| US6897546B1 (en) | 2005-05-24 |
| TW479361B (en) | 2002-03-11 |
| JP4707203B2 (ja) | 2011-06-22 |
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