DE4306320B4 - Method for increasing the dielectric strength of a multilayer semiconductor component - Google Patents
Method for increasing the dielectric strength of a multilayer semiconductor component Download PDFInfo
- Publication number
- DE4306320B4 DE4306320B4 DE19934306320 DE4306320A DE4306320B4 DE 4306320 B4 DE4306320 B4 DE 4306320B4 DE 19934306320 DE19934306320 DE 19934306320 DE 4306320 A DE4306320 A DE 4306320A DE 4306320 B4 DE4306320 B4 DE 4306320B4
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- dielectric strength
- radiation
- semiconductor component
- mask
- lbz
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000005855 radiation Effects 0.000 claims abstract description 30
- 230000003068 static effect Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000011133 lead Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep 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
- H01L29/66363—Thyristors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor 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
- H01L29/0603—Semiconductor 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
- H01L29/0607—Semiconductor 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 for preventing surface leakage or controlling electric field concentration
- H01L29/0611—Semiconductor 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 for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types 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
- H01L29/70—Bipolar devices
- H01L29/74—Thyristor-type devices, e.g. having four-zone regenerative action
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- High Energy & Nuclear Physics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Thyristors (AREA)
Abstract
Verfahren zur Erhöhung der Spannungsfestigkeit eines Halbleiterbauelements,
bei dem eine Folge von Halbleiterschichten (1 bis 4) alternierender Leitungstypen vorgesehen sind, die durch pn-Übergänge (7, 8) voneinander getrennt sind,
bei dem Elektroden (5, 6) angebracht sind, über die eine Spannung anlegbar ist, welche wenigstens einen der pn-Übergänge (7, 8) in Sperrichtung vorspannt,
bei dem ein zentraler Bereich (LBz) des Bauelements mit einer Bestrahlungsmaske (15) abgedeckt wird und bei dem lediglich im Bereich (LBr) des Randabschlusses (12, 13) dieses pn-Übergangs (7, 8) die Trägerlebensdauer durch direkte Bestrahlung mit Elektronen (14) reduziert wird,
dadurch gekennzeichnet,
daß die Dicke (19) und/oder das Material der Bestrahlungsmaske so gewählt wird, daß gleichzeitig mit der Erhöhung der Spannungsfestigkeit im Randbereich (LBr) mit Hilfe der infolge der Bestrahlung mit Elektronen in der Bestrahlungsmaske entstehenden Bremsstrahlung statische und dynamische elektrische Parameter des Halbleiterbauelements, die von der Trägerlebensdauer im zentralen Bereich (LBz) abhängen, gezielt eingestellt...Method for increasing the dielectric strength of a semiconductor component,
in which a sequence of semiconductor layers (1 to 4) of alternating conductivity types is provided, which are separated from one another by pn junctions (7, 8),
to which electrodes (5, 6) are attached, via which a voltage can be applied which biases at least one of the pn junctions (7, 8) in the reverse direction,
in which a central area (LBz) of the component is covered with an irradiation mask (15) and in which only in the area (LBr) of the edge termination (12, 13) of this pn junction (7, 8) the carrier lifetime by direct irradiation with electrons (14) is reduced,
characterized,
that the thickness (19) and / or the material of the radiation mask is selected such that, at the same time as the dielectric strength in the edge region (LBr) increases, static and dynamic electrical parameters of the semiconductor component are generated with the help of the braking radiation resulting from the radiation with electrons in the radiation mask, that depend on the carrier life in the central area (LBz), specifically set ...
Description
Verfahren zur Erhöhung der Spannungsfestigkeit eines mehrschichtigen Halbleiterbauelements.Method of increasing dielectric strength of a multilayer semiconductor device.
Die Erfindung bezieht sich auf ein Verfahren zur Erhöhung der Spannungsfestigkeit eines mehrschichtigen Halbleiterbauelements nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a Procedure for raising the dielectric strength of a multilayer semiconductor component according to the preamble of claim 1.
Ein Verfahren dieser Art ist beispielsweise aus der US-Patentschrift 3,872,493 vom 18. März 1975 bekannt. Dabei wird eine für Elektronen undurchlässige Bestrahlungsmaske verwandt, die beispielsweise aus gewöhnlichem Stahl oder Wolfram besteht und eine Dicke von ca. 4 mm aufweist. Die infolge der Elektronenbestrahlung in der Bestrahlungsmaske erzeugte Bremsstrahlung (Gamma-Strahlung), im Bereich unterhalb der Bestrahlungsmaske, die die Ladungsträgerlebensdauer im Halbleiterbauelement verringert, bleibt dabei unberücksichtigt.A method of this type is, for example, from the U.S. patent 3,872,493 of March 18, 1975 known. One for Electron impermeable Irradiation mask related, for example from ordinary Steel or tungsten exists and has a thickness of approx. 4 mm. The one generated as a result of electron radiation in the radiation mask Brake radiation (gamma radiation), in the area below the radiation mask the carrier lifetime reduced in the semiconductor device is not taken into account.
KULKE, B.; FRYE, R.; PENKO, F.: Effects of Irradiation on Hall Probe Sensitivity. In: Particle Accelerator Conference, 1989; Üproceedings of the 1898 IEEE. IEEE-Catalog Number 89CH2669-0 beschreibt den Einfluss von Bremsstrahlung auf die Trägerlebensdauer bei Hall-Sonden.KULKE, B .; FRYE, R .; PENKO, F .: Effects of Irradiation on Hall Probe Sensitivity. In: Particle Accelerator Conference, 1989; Üproceedings of the 1898 IEEE. IEEE Catalog Number 89CH2669-0 describes the Influence of brake radiation on the carrier life with Hall probes.
Der Erfindung liegt nun die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art anzugeben, das gleichzeitig durch eine Bestrahlung mit Elektronen neben einer deutlichen Anhebung der Spannungsfestigkeit auch das gezielte Einstellen statischer und dynamischer elektrischer Parameter des Halbleiterbauelements, die von der Trägerlebensdauer im zentralen lateralen Bereich abhängen, gestattet. Das erfindungsgemäße Verfahren zeichnet sich insbesondere dadurch aus, daß in einfacher Weise, nämlich durch Wählen des Materials und/oder der Dicke der Bestrahlungsmaske gleichzeitig mit der Erhöhung der Spannungsfestigkeit im Randbereich statische und dynamische elektrische Pa rameter des Halbleiterbauelements im zentralen Bereich, wie beispielsweise die Durchlaßspannung oder die Freiwerdezeit, mit Hilfe der infolage der Bestrahlung mit Elektronen in der Bestrahlungsmaske entstehenden Bremsstrahlung gezielt eingestellt werden können.The object of the invention is now based on specifying a method of the type mentioned at the outset that at the same time by irradiation with electrons in addition to a clear one Increasing the dielectric strength also the targeted setting of static and dynamic electrical parameters of the semiconductor component, that of the vehicle life hanging in the central lateral area, allowed. The method according to the invention is particularly characterized in that in a simple manner, namely by Choose the material and / or the thickness of the radiation mask at the same time with the increase the dielectric strength in the edge area static and dynamic electrical parameters of the semiconductor component in the central area, such as forward voltage or the liberation time, with the help of the electron irradiation Braking radiation generated in the radiation mask is specifically set can be.
Die Patentansprüche 2 und 3 sind auf bevorzugte Weiterbildungen des erfindungsgemäßen Verfahrens gerichtet.Claims 2 and 3 are preferred Developments of the method according to the invention directed.
Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Dabei zeigtThe invention is described below closer to the drawing explained. It shows
In
Wird an die Anschlüsse A und
K eine Spannung geschaltet, die die Elektrode
Zur Erhöhung der Spannungsfestigkeit
wird nun lediglich im lateralen Bereich LBr der seitlichen Randabschlüsse
Vielfach besteht bei Halbleiterbauelementen, wie beispielsweise Thyristoren und Transistoren, der Wunsch neben der Erzielung einer hohen Sperrspannung statische und dynamische elektrische Parameter, wie beispielsweise die Durchlaßspannung und die Freiwerdezeit des Halbleiterbauelements, gezielt einzustellen.Often there are semiconductor devices such as For example, thyristors and transistors, the desire in addition to the Achieve a high reverse static and dynamic electrical voltage Parameters such as the forward voltage and the release time of the semiconductor component to be set specifically.
Die elektrischen Parameter, die von der Trägerlebensdauer im zentralen Bereich LBz abhängen, wie beispielsweise die Freiwerdezeit, können hierzu beispielsweise durch auf den zentralen Bereich LBz gerichtete Gammastrahlen eingestellt werden, wobei infolge der zusätzlich erzeugten Energieniveaus im Atomgitter die Rekombinationsrate erhöht wird und somit Speicherladungen schneller entfernt werden, womit beispielsweise die Freiwerdezeit des Halbleiterbauelements verkürzt wird.The electrical parameters by the carrier life depend in the central area LBz how for example, the time off, for example adjusted by gamma rays directed at the central area LBz be, as a result of the additional generated energy levels in the atomic lattice the recombination rate is increased and thus storage charges are removed more quickly, for example the free time of the semiconductor component is shortened.
Nach dem erfindungsgemäßen Verfahren wird
nun die in der Bestrahlungsmaske durch die Elektronenbestrahlung
erzeugte Bremsstrahlung (Gammastrahlung) dazu benutzt, um gleichzeitig
mit der infolge der direkten Bestrahlung mit Elektronen erhöhten Spannungsfestigkeit
im Randbereich LBr auch die statischen und dynamischen elektrischen Parameter
die von der Trägerlebensdauer
im zentralen Bereich LBz abhängen,
zum Beispiel die Freiwerdezeit, gezielt einzustellen. Durch die
Gammastrahlung wird auch im zentralen Bereich LBz die Sperrfähigkeit
der pn-Übergänge erhöht, allerdings
ist dieser Effekt nicht so stark ausgeprägt wie die Erhöhung der Sperrfähigkeit
im Randbereich LBr, da die Erniedrigung der Trägerlebensdauer durch die Gammastrahlung
geringer ist als durch die direkte Elektronenstrahlung. Da die Energie
der Elektronen mindestens ein MeV betragen sollte, damit im wesentlichen
nicht nur elastische Stöße im Atomgitter
auftreten, wird eine Elektronenenergie zwischen 1 und 16 MeV und bevorzugt
eine Elektronenenergie von 5 MeV gewählt. Die verwandte Elektronendichte
beträgt
dabei in der Regel zwischen 1013 und 1015 Elektronen/cm2. Um
nun die geeignete Dosis von Gammastrahlen, von beispielsweise 1012 cm2, zur Einstellung
der dynamischen elektrischen Parameter, die von der Trägerlebensdauer
im zentralen Bereich abhängen,
zu erhalten, werden das Material und/oder die Dicke
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19934306320 DE4306320B4 (en) | 1993-03-01 | 1993-03-01 | Method for increasing the dielectric strength of a multilayer semiconductor component |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19934306320 DE4306320B4 (en) | 1993-03-01 | 1993-03-01 | Method for increasing the dielectric strength of a multilayer semiconductor component |
Publications (2)
Publication Number | Publication Date |
---|---|
DE4306320A1 DE4306320A1 (en) | 1994-09-08 |
DE4306320B4 true DE4306320B4 (en) | 2004-08-05 |
Family
ID=6481637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19934306320 Expired - Lifetime DE4306320B4 (en) | 1993-03-01 | 1993-03-01 | Method for increasing the dielectric strength of a multilayer semiconductor component |
Country Status (1)
Country | Link |
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DE (1) | DE4306320B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8546918B2 (en) | 2010-06-22 | 2013-10-01 | Infineon Technologies Ag | Semiconductor device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3872493A (en) * | 1972-08-25 | 1975-03-18 | Westinghouse Electric Corp | Selective irradiation of junctioned semiconductor devices |
-
1993
- 1993-03-01 DE DE19934306320 patent/DE4306320B4/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3872493A (en) * | 1972-08-25 | 1975-03-18 | Westinghouse Electric Corp | Selective irradiation of junctioned semiconductor devices |
Non-Patent Citations (1)
Title |
---|
Kulke, B., Frye, R., Penko, F.: Effects of Irra- diation on Hall Probe Sensitivity. In: Particle Accelerator Conference, 1989. Proceedings of the 1989 IEEE. IEEE-Catalog Number 89CH2669-0 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8546918B2 (en) | 2010-06-22 | 2013-10-01 | Infineon Technologies Ag | Semiconductor device |
Also Published As
Publication number | Publication date |
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DE4306320A1 (en) | 1994-09-08 |
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8127 | New person/name/address of the applicant |
Owner name: INFINEON TECHNOLOGIES AG, 81669 MUENCHEN, DE |
|
8364 | No opposition during term of opposition | ||
R071 | Expiry of right | ||
R071 | Expiry of right |