DE102008015452A1 - Corrosion protection layer for semiconductor devices - Google Patents
Corrosion protection layer for semiconductor devices Download PDFInfo
- Publication number
- DE102008015452A1 DE102008015452A1 DE102008015452A DE102008015452A DE102008015452A1 DE 102008015452 A1 DE102008015452 A1 DE 102008015452A1 DE 102008015452 A DE102008015452 A DE 102008015452A DE 102008015452 A DE102008015452 A DE 102008015452A DE 102008015452 A1 DE102008015452 A1 DE 102008015452A1
- Authority
- DE
- Germany
- Prior art keywords
- layer
- corrosion protection
- protection layer
- semiconductor element
- diffusion barrier
- 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
- 239000004065 semiconductor Substances 0.000 title claims abstract description 43
- 238000005260 corrosion Methods 0.000 title claims abstract description 36
- 230000007797 corrosion Effects 0.000 title claims abstract description 36
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 58
- 238000009792 diffusion process Methods 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 22
- 230000004888 barrier function Effects 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000011241 protective layer Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 210000001654 germ layer Anatomy 0.000 description 10
- 230000008021 deposition Effects 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
Landscapes
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Electrodes Of Semiconductors (AREA)
- Photovoltaic Devices (AREA)
Abstract
Ein Halbleiter-Bauelement (1) weist eine Korrosions-Schutzschicht (6) auf, welche zumindest teilweise aus Nickel ist.A semiconductor device (1) has a corrosion protection layer (6) which is at least partially made of nickel.
Description
Die Erfindung betrifft ein Halbleiter-Element mit einer Korrosions-Schutzschicht sowie ein Verfahren zum Herstellen desselben.The The invention relates to a semiconductor element having a corrosion protection layer and a method for producing the same.
Der
prinzipielle Aufbau und ein Verfahren zur Herstellung eines Halbleiter-Bauelements
mit einer Leitungsschicht aus Kupfer ist in der
Kupfer weist eine gute elektrische Leitfähigkeit auf und ist relativ kostengünstig. Nachteilig ist, dass Kupfer sehr leicht oxidiert und sich dann nicht mehr gut verlöten lässt. Außerdem wird durch die Oxidation die Leitfähigkeit von Kupfer vermindert. Aus diesem Grund muss eine Leitungsschicht aus Kupfer im Allgemeinen mit einer Korrosions-Schutzschicht abgedeckt werden. Als Korrosions-Schutz werden üblicherweise Zinn oder Silber eingesetzt. Während Silber sehr teuer ist, hat eine Korrosions-Schutzschicht aus Zinn eine typische Dicke von mindestens 3 μm. Wenn es sich bei dem Halbleiter-Bauelement um eine Solarzelle handelt und die Korrosionsschutzschicht auf den Frontkontakt aufgebracht wird, würde eine 3 μm dicke Zinnschicht zu einer erhöhten Abschattung und somit zu einer Verminderung des Wirkungsgrades der Solarzelle führen.copper has good electrical conductivity and is relative inexpensive. The disadvantage is that copper is very light oxidized and then can not be soldered well. In addition, the oxidation is the conductivity reduced by copper. For this reason, a conductor layer must be made of copper generally covered with a corrosion protection layer become. As corrosion protection are usually tin or silver used. While silver is very expensive, has a corrosion protection layer of tin a typical thickness of at least 3 μm. If the semiconductor device is a Solar cell acts and the corrosion protection layer on the front contact is applied, would a 3 micron thick tin layer to an increased shading and thus to a reduction the efficiency of the solar cell lead.
Es ist daher Aufgabe der Erfindung, eine verbesserte Korrosions-Schutzschicht zu schaffen.It It is therefore an object of the invention to provide an improved corrosion protection layer to accomplish.
Diese Aufgabe wird durch die Merkmale der Ansprüche 1 und 9 gelöst. Der Kern der Erfindung besteht darin, die Korrosions-Schutzschicht zumindest anteilsweise aus Nickel auszubilden. Eine derartige Schutzschicht kann wesentlich dünner als eine Korrosions-Schutzschicht aus Zinn ausgebildet sein, was im Falle eines Solarzellen Frontkontaktes zu einer geringeren Abschattung und somit zu einem erhöhten Wirkungsgrad der Solarzelle führt. Im Vergleich zu Silber sind die Materialkosten von Nickel deutlich geringer. Außerdem ist die Nickel-Oberfläche auch nach längerer Lagerung an Luft noch gut lötbar. Weitere Vorteile der Erfindung ergeben sich aus den Unteransprüchen.These The object is solved by the features of claims 1 and 9. The essence of the invention is the corrosion protection layer at least partly made of nickel. Such a protective layer can much thinner than a corrosion protective layer Tin be formed, which in the case of a solar cell front contact to a lower shadowing and thus to an increased Efficiency of the solar cell leads. Compared to silver the material costs of nickel are significantly lower. Furthermore is the nickel surface even after prolonged storage In the air still good solderable. Further advantages of the invention emerge from the dependent claims.
Zusätzliche Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung mehrerer Ausführungsbeispiele anhand der Zeichnungen. Es zeigen:additional Features and details of the invention will become apparent from the following Description of several embodiments with reference to the drawings. Show it:
Rein vorsorglich wird darauf hingewiesen, dass die Figuren nicht maßstabsgerecht sind.Purely As a precaution, it should be noted that the figures are not to scale are.
Im
Folgenden wird unter Bezugnahme auf die
Als
Halbleiter-Substrat
Die
Keimschicht
Die
Diffusionsbarriere
Die
Leitungs-Schicht
Die
Leitungs-Schicht
Die
Korrosions-Schutzschicht
Die
Korrosions-Schutzschicht
Die
Korrosions-Schutzschicht
Vorteilhafterweise
weist die Diffusionsbarriere
Im
Folgenden wird ein Verfahren zur Herstellung des Halbleiter-Bauelements
In
einem ersten Verfahrensschritt wird das Halbleiter-Substrat
In
einem weiteren Verfahrensschritt einer ersten elektrolytischen Abscheidung
wird das Halbleiter-Substrat
Insbesondere
wird die elektrolytische Abscheidung der Diffusionsbarriere
In
einem weiteren Verfahrensschritt, einer zweiten elektrolytischen
Abscheidung, wird die Leitungs-Schicht
Schließlich
wird auf der Leitungs-Schicht
In
einem weiteren – nicht in den Figuren dargestellten – Beispiel
entfällt die Trennung in Keimschicht
Im
Folgenden wird unter Bezugnahme auf die
Bei
diesem Ausführungsbeispiel ist die Keimschicht
In
einem weiteren, nicht in den Figuren dargestellten Ausführungsbeispiel
entfällt die Diffusionsbarriere
Selbstverständlich
ist es möglich, die Ausführungsformen gemäß
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 102007031958 [0002, 0022] - DE 102007031958 [0002, 0022]
Claims (11)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008015452A DE102008015452A1 (en) | 2008-03-22 | 2008-03-22 | Corrosion protection layer for semiconductor devices |
PCT/EP2009/001933 WO2009118118A1 (en) | 2008-03-22 | 2009-03-17 | Corrosion protection layer for semiconductor components |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008015452A DE102008015452A1 (en) | 2008-03-22 | 2008-03-22 | Corrosion protection layer for semiconductor devices |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008015452A1 true DE102008015452A1 (en) | 2009-09-24 |
Family
ID=40732112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008015452A Ceased DE102008015452A1 (en) | 2008-03-22 | 2008-03-22 | Corrosion protection layer for semiconductor devices |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102008015452A1 (en) |
WO (1) | WO2009118118A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008031836A1 (en) | 2008-07-05 | 2010-01-21 | Deutsche Cell Gmbh | solder contact |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5258077A (en) * | 1991-09-13 | 1993-11-02 | Solec International, Inc. | High efficiency silicon solar cells and method of fabrication |
US6479744B1 (en) * | 1997-12-22 | 2002-11-12 | Canon Kabushiki Kaisha | Photovoltaic device module |
DE102007031958A1 (en) | 2007-07-10 | 2009-01-15 | Deutsche Cell Gmbh | Contact structure for a semiconductor device and method for producing the same |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4557037A (en) * | 1984-10-31 | 1985-12-10 | Mobil Solar Energy Corporation | Method of fabricating solar cells |
US5118362A (en) * | 1990-09-24 | 1992-06-02 | Mobil Solar Energy Corporation | Electrical contacts and methods of manufacturing same |
GB2260220B (en) * | 1991-09-10 | 1996-01-03 | Sanyo Electric Co | An amorphous silicon solar cell and method of the solar cell manufacture |
US5591565A (en) * | 1992-03-20 | 1997-01-07 | Siemens Solar Gmbh | Solar cell with combined metallization and process for producing the same |
DE19525720C2 (en) * | 1995-07-14 | 1998-06-10 | Siemens Solar Gmbh | Manufacturing process for a solar cell without front-side metallization |
US5923955A (en) * | 1998-05-28 | 1999-07-13 | Xerox Corporation | Fine flip chip interconnection |
DE102005029784A1 (en) * | 2005-06-24 | 2007-01-11 | Siemens Ag | Electronic assembly and method of making an electronic assembly |
-
2008
- 2008-03-22 DE DE102008015452A patent/DE102008015452A1/en not_active Ceased
-
2009
- 2009-03-17 WO PCT/EP2009/001933 patent/WO2009118118A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5258077A (en) * | 1991-09-13 | 1993-11-02 | Solec International, Inc. | High efficiency silicon solar cells and method of fabrication |
US6479744B1 (en) * | 1997-12-22 | 2002-11-12 | Canon Kabushiki Kaisha | Photovoltaic device module |
DE102007031958A1 (en) | 2007-07-10 | 2009-01-15 | Deutsche Cell Gmbh | Contact structure for a semiconductor device and method for producing the same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008031836A1 (en) | 2008-07-05 | 2010-01-21 | Deutsche Cell Gmbh | solder contact |
Also Published As
Publication number | Publication date |
---|---|
WO2009118118A1 (en) | 2009-10-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
R016 | Response to examination communication | ||
R016 | Response to examination communication | ||
R016 | Response to examination communication | ||
R002 | Refusal decision in examination/registration proceedings | ||
R003 | Refusal decision now final |
Effective date: 20130806 |