EP1190446A1 - Composant et son procede de realisation - Google Patents

Composant et son procede de realisation

Info

Publication number
EP1190446A1
EP1190446A1 EP00934843A EP00934843A EP1190446A1 EP 1190446 A1 EP1190446 A1 EP 1190446A1 EP 00934843 A EP00934843 A EP 00934843A EP 00934843 A EP00934843 A EP 00934843A EP 1190446 A1 EP1190446 A1 EP 1190446A1
Authority
EP
European Patent Office
Prior art keywords
layer
copper
deposited
temperature
aluminum
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.)
Withdrawn
Application number
EP00934843A
Other languages
German (de)
English (en)
Inventor
Jürgen RAMM
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.)
Inficon GmbH
Original Assignee
Unaxis Balzers AG
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 Unaxis Balzers AG filed Critical Unaxis Balzers AG
Publication of EP1190446A1 publication Critical patent/EP1190446A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

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    • H01L23/482—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of lead-in layers inseparably applied to the semiconductor body
    • H01L23/485—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of lead-in layers inseparably applied to the semiconductor body consisting of layered constructions comprising conductive layers and insulating layers, e.g. planar contacts
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    • H01L2924/20—Parameters
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    • H01L2924/20752—Diameter ranges larger or equal to 20 microns less than 30 microns

Definitions

  • the present invention relates in particular to the field of the semiconductor industry and in particular to the area "assembling and packaging (A + P)".
  • the present invention is based on the object of proposing a component with at least one connection of a metal part at least essentially made of copper with a second part made of a metal, which connection is mechanically and electrically perfect, and a method for producing such components.
  • components according to the invention are distinguished according to the wording of claim 1 or 2.
  • Preferred embodiments of these components are specified in claims 3 to 12.
  • the object is achieved in that the copper part or parts - provided two copper parts are to be bonded - are provided with a layer which is stable at a temperature of at least 80 ° C. and which is furthermore at this temperature forms an oxygen diffusion barrier, at least approximated to an aluminum oxide layer on aluminum, if not better, that forms in a normal environment, and that the parts are bonded, while heating to at least the temperature mentioned, according to claim 13.
  • the further preferred Embodiments also apply, analogously, to the components according to the invention.
  • a layer is provided for this purpose, which is preferably stable at a temperature of at least 100 ° C., preferably of at least 150 ° C., preferably up to at least 200 ° C., particularly preferably even up to at least 300 ° C. whereby the bonding is continued with heating to at least the temperature mentioned.
  • this does not mean that if the layer is stable even at a high temperature, for example of 350 ° C, bonding must also be carried out at this temperature.
  • the bonding can be carried out at lower temperatures, but at least at 80 ° C, preferably at least 150 ° C, more preferably at least 200 ° C.
  • a layer is provided which, in terms of mechanical and thermal properties and in terms of oxygen diffusion behavior, is at least approximated, if not better, to an aluminum oxide layer which forms on aluminum in a normal environment.
  • the second part can also be at least essentially made of copper and, as mentioned, is provided with a layer, or it preferably consists essentially of gold or aluminum.
  • At least one of the parts is preferably designed as a wire and used as "wire bonding" bonding.
  • the layer mentioned is also provided as an electrically conductive or an electrically insulating layer. Their property in this regard can certainly be exploited, i.e. the layer can be used as an insulation or conductor layer.
  • the following materials or mixtures thereof are preferably suitable as the material of the layer mentioned: a) SiO x with 1.5 ⁇ x ⁇ 2, preferably with 1 x ⁇ 2,
  • This provision includes the depositing of a layer and, if appropriate, an aftertreatment of this deposited layer, so that the resulting intended layer results from the deposited layer and subsequently subjected to the aftertreatment.
  • a layer is preferably deposited by a vacuum coating method, such as e.g. by a CVD, a PVD, a PECVD, a PEPVD process or by plasma polymerization.
  • a vacuum coating method such as e.g. by a CVD, a PVD, a PECVD, a PEPVD process or by plasma polymerization.
  • the layer is preferably deposited with a thickness d of at least 1.5 nm, preferably of at least 2.0 nm, in particular in one area
  • the thickness of the layer is limited downwards in particular by the demands placed on it as an oxygen diffusion barrier. Towards the top, the thickness to be provided is primarily limited by the breaking ability of the bonding to be carried out.
  • the layer is further proposed X-ray amorphous or glassy. This requirement also sets a lower limit for the layer thickness d, which must therefore not be designed as an atomic monolayer or would then no longer be oxygen-tight.
  • the layer can consist of a material with an oxygen getter effect, for example of a hypoechiometric oxide, in particular of SiO x with x ⁇ 2.
  • the layer provided with regard to its conductivity on the coated part can also be used as a functional layer, ie as a conductor layer or insulation layer.
  • the layer mentioned is provided by depositing a layer and then treating it afterwards by treatment in a nitrogen plasma and / or by treatment in a normal atmosphere.
  • This procedure is particularly suitable for depositing a layer of SiO 2 , preferably on a cleaned copper surface, and for performing the aftertreatment in a nitrogen plasma.
  • the Si0 2 layer is preferably deposited by sputtering.
  • the provision of the layer comprises depositing a layer and aftertreatment of this layer
  • a layer of Si be deposited, again preferably by sputtering and the aftertreatment by treatment Normal atmosphere, preferably a thermal.
  • the thickness d of the deposited and subsequently through-oxidized layer is further preferably selected
  • FIG. 2 schematically shows a bond connection provided on a component according to the invention.
  • Wafers coated with copper served as the starting substrate for the experiments. Copper layer thicknesses of 500 nm and 1000 nm were used.
  • the thinner copper layers in the range of 500 nm were deposited by sputtering, the thicker electrolytically deposited the.
  • the copper surface was cleaned in a hydrogen plasma. It was found, however, that this surface cleaning did not lead to an increase in the tensile strength compared to wafers, where, with an identical coating, no cleaning was carried out. Therefore, the need for early cleaning cannot be proven experimentally.
  • it should be borne in mind that under production conditions the copper surfaces are exposed to a wide variety of environmental conditions, and that it is most likely entirely advantageous to precede the mentioned cleaning step before the actual deposition of the layer according to the invention, either in order to create the same initial conditions for the coating.
  • Table 1 shows the results for the eight specified hard layer materials No. 1 to No. 8, each with two layer thicknesses, and examined at the bond temperatures of 40 ° C. and 200 ° C. It can be seen that at bond temperatures of 200 ° C, which is sought for the reasons given above, only Si0 2 , Si 3 N 4 or Ta 4 5Si ⁇ 5 N 4 o and TiN leads to bondability. It is also striking that layer thicknesses in the range of 3 nm tend to give better bondability than higher layer thicknesses.
  • these also include TiN, further SiO x (substoichiometric silicon oxide) aluminum oxide (preferably substoichiometric), TiSiN, TaN, WSiN, ReO, PdO, ZrO, YO , ZrN, NbN, VN, optionally also CuN.
  • the effect of the layer material as an oxygen diffusion barrier can be increased by using substoichiometric SiO x or basically a material with an oxygen getter effect, for example a substoichiometric oxide.
  • Table 3 shows the resulting tensile strengths of the resulting bond connections according to Experiments Nos. 1, 7 and 4.
  • the copper surface is covered with a thin metallic
  • Layer e.g. coated with Al, Si, Cr etc. and then oxidized through in the atmosphere, possibly with heating, to form a dense diffusion barrier against oxidation of the copper.
  • the layer is formed thin enough that it is completely oxidized and there is no residual metal left to form an intermetallic connection with the copper. This is achieved with metallic layer thicknesses of 3 nm to 10 nm, preferably from 4 nm to 6 nm.
  • the present invention continues to ensure the use of existing standard equipment for wire bonding for copper technology, eg in chip production. This equipment works with bond temperatures well above 80 ° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Wire Bonding (AREA)
  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)

Abstract

La présente invention concerne un substrat (1) recouvert d'une couche principalement constituée de cuivre (2). Un fil (3) est relié à la couche de cuivre (2) par métallisation et formation d'une liaison intermétallique. Une couche dure (5) recouvrant la couche principalement constituée de cuivre (2) est transpercée au niveau de la métallisation. La couche dure qui est stable à une température d'au moins 80 DEG C sert, à cette température, de barrière à diffusion d'oxygène et a une action sur l'aluminium similaire à celle d'une couche d'oxyde d'aluminium se formant dans un environnment normal.
EP00934843A 1999-06-28 2000-06-22 Composant et son procede de realisation Withdrawn EP1190446A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH119799 1999-06-28
CH119799 1999-06-28
PCT/CH2000/000339 WO2001001478A1 (fr) 1999-06-28 2000-06-22 Composant et son procede de realisation

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EP1190446A1 true EP1190446A1 (fr) 2002-03-27

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EP (1) EP1190446A1 (fr)
JP (1) JP2003503852A (fr)
KR (1) KR100863388B1 (fr)
CN (1) CN1199254C (fr)
AU (1) AU5057600A (fr)
CA (1) CA2377628A1 (fr)
HK (1) HK1048889A1 (fr)
TW (1) TW469550B (fr)
WO (1) WO2001001478A1 (fr)

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US6790757B1 (en) * 1999-12-20 2004-09-14 Agere Systems Inc. Wire bonding method for copper interconnects in semiconductor devices
CN1802744A (zh) * 2003-04-09 2006-07-12 库利克-索法投资公司 集成电路的电交互连接结构及其制造方法
CN100349028C (zh) * 2004-05-21 2007-11-14 日立电线株式会社 中空波导管及其制造方法
DE102007061942A1 (de) * 2007-12-21 2009-07-02 Continental Automotive Gmbh Schaltungsträger, Verfahren zur Herstellung eines Schaltungsträgers sowie Bondverfahren
DE102008043361A1 (de) * 2008-10-31 2010-05-06 Micro Systems Engineering Gmbh Anschlussdraht und Verfahren zur Herstellung eines solchen
JP2013118310A (ja) * 2011-12-05 2013-06-13 Jjtech Co Ltd 半導体装置
DE102013216282B4 (de) * 2013-08-16 2020-10-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Elektrisches Bauteil mit einer elektrisch zu kontaktierenden Stelle sowie Verfahren zur Vorbereitung eines elektrischen Bauteils für einen Lötprozess und Verwendung einer entsprechenden Matrix
US20200273716A1 (en) * 2017-07-07 2020-08-27 Mitsubishi Electric Corporation Semiconductor device and method for manufacturing semiconductor device
KR102640972B1 (ko) * 2021-05-28 2024-02-23 부산대학교 산학협력단 실리콘이 코팅 된 구리 제조방법, 이를 이용한 실리콘이 코팅된 산화방지용 구리 및 이를 이용한 반도체 장치

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KR100863388B1 (ko) 2008-10-13
KR20020019479A (ko) 2002-03-12
CN1199254C (zh) 2005-04-27
AU5057600A (en) 2001-01-31
JP2003503852A (ja) 2003-01-28
US6916739B2 (en) 2005-07-12
HK1048889A1 (zh) 2003-04-17
CA2377628A1 (fr) 2001-01-04
US20040087150A1 (en) 2004-05-06
WO2001001478A1 (fr) 2001-01-04
TW469550B (en) 2001-12-21
CN1365517A (zh) 2002-08-21

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