WO2004012226A2 - Procede de fabrication de film polymere conducteur anisotrope sur tranche de semi-conducteur - Google Patents
Procede de fabrication de film polymere conducteur anisotrope sur tranche de semi-conducteur Download PDFInfo
- Publication number
- WO2004012226A2 WO2004012226A2 PCT/FR2003/002312 FR0302312W WO2004012226A2 WO 2004012226 A2 WO2004012226 A2 WO 2004012226A2 FR 0302312 W FR0302312 W FR 0302312W WO 2004012226 A2 WO2004012226 A2 WO 2004012226A2
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- WO
- WIPO (PCT)
- Prior art keywords
- conductive
- layer
- inserts
- polymer film
- connection pad
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000004065 semiconductor Substances 0.000 title claims abstract description 29
- 229920001940 conductive polymer Polymers 0.000 title claims abstract description 28
- 238000002161 passivation Methods 0.000 claims abstract description 18
- 229920000642 polymer Polymers 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 16
- 229920005989 resin Polymers 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 238000000151 deposition Methods 0.000 claims description 12
- 239000011810 insulating material Substances 0.000 claims description 12
- 230000008021 deposition Effects 0.000 claims description 11
- 238000005530 etching Methods 0.000 claims description 7
- 230000001464 adherent effect Effects 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 6
- 239000008188 pellet Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 238000003486 chemical etching Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 239000012815 thermoplastic material Substances 0.000 claims description 2
- 238000001312 dry etching Methods 0.000 claims 1
- 239000007769 metal material Substances 0.000 claims 1
- 238000001039 wet etching Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 20
- 239000002184 metal Substances 0.000 description 20
- 239000000758 substrate Substances 0.000 description 14
- 235000012431 wafers Nutrition 0.000 description 12
- 239000002245 particle Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000009396 hybridization Methods 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000001459 lithography Methods 0.000 description 2
- 239000011325 microbead Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910007116 SnPb Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/06—Polymers
- H01L2924/078—Adhesive characteristics other than chemical
- H01L2924/0781—Adhesive characteristics other than chemical being an ohmic electrical conductor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/12—Passive devices, e.g. 2 terminal devices
- H01L2924/1204—Optical Diode
- H01L2924/12044—OLED
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/14—Integrated circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/301—Electrical effects
- H01L2924/30107—Inductance
Definitions
- the invention relates to a method for making an anisotropic conductive polymer film on a semiconductor wafer.
- the invention also relates to a method for manufacturing a semiconductor chip provided with an anisotropic conductive polymer film as well as a semiconductor chip provided with an anisotropic conductive polymer film.
- This technology is based on the implementation of a process on a complete wafer of semiconductor material requiring two levels of lithography: a first level to define the metallurgy for attaching microbeads and a second level dedicated to the electrolytic deposition of fusible materials. This method cannot be used for the interconnection of cut chips or when the number of wafers to be treated is too low to justify the drawing of specific masks necessary for the lithography step.
- the ACF technique relates to conductive films made of conductive particles incorporated in an insulating film or of metallic inserts included in an insulating film.
- ACF films with conductive particles incorporated in an insulating film are the best known.
- This type of film is based on a random distribution of conductive particles in a polymer matrix.
- the conductive particles typically have a diameter of a few microns. These are either metal coated polymer beads, or metal beads which can be, for example, nickel or silver.
- the interconnection is obtained by bonding the film between the substrate and the chip, bonding being followed by thermocompression.
- the interconnection of a chip and a substrate using a film with conductive particles is shown in FIG. 1A.
- a chip 1 provided with conductive pads 5 is connected to a substrate 2 provided with conductive pads 7.
- An ACF film consisting of an insulating film 3 in which 'conductive particles 4 are incorporated is placed between the chip and the substrate.
- Bosses 6 establish contact between the studs conductors and ACF film.
- This type of interconnection leads to a relatively high electrical contact resistance, which reduces the scope of its fields of application.
- ACF films with through metal inserts The production of an ACF film with through metal inserts is based on the orderly insertion of metallic microstructures into a sheet of polymer.
- the interconnection of a chip and a substrate using a film with through metal inserts is shown in FIG. 1B.
- the ACF film consists of an insulating film 8 in which metal inserts are placed 9.
- a high redundancy in the number of contacts per pad ensures a homogeneous contact of low resistivity and making it possible to pass large currents.
- ACF films causes several problems, including that of the reliability of the electrical contact. Indeed, oxidized layers are formed on the ends of the metal inserts and on the interconnection pads of the chip, which leads to greatly reducing the quality of the electrical contacts.
- a solution has been proposed to this problem, namely, the addition of a fusible material to the ends of the metal inserts.
- the fusible material is liable to creep during its redesign and, consequently, to short-circuit the metal inserts.
- impurities can be reported between the film and the chip or between the film and its substrate during hybridization.
- the films are produced on a rigid sacrificial support which must be separated from the ACF film before hybridization. It is then necessary to assemble three elements, the chip, the film and the substrate.
- the present invention does not have the drawbacks mentioned above.
- the invention relates to an anisotropic conductive polymer film making process on a wafer coated semiconductor, on a 'face, a passivation layer is practiced wherein at least one opening exposing a bonding pad electric.
- the method comprises at least the following successive steps:
- the filling of the through holes is carried out by electrolytic growth assisted or not by an electric field.
- the method according to the invention comprises, between the step of filling the through holes with one or more materials conductors and the step of removing the polymer layer, the following successive steps: deposition of a photosensitive resin on the photosensitive polymer layer in which the conductive inserts are formed, exposure and development of the photosensitive resin through a mask so that only one resin pellet remains at the top of a first end of each insert, - isotropic chemical etching of the first ends of the conductive inserts until the resin pellets are removed so that a point appears on the first end of each conductive insert.
- the invention also relates to a method for manufacturing a semiconductor chip.
- the method comprises a method for manufacturing an anisotropic conductive polymer film on a semiconductor wafer according to the invention and a step for cutting a structure resulting from said anisotropic conductive polymer film on a semiconductor wafer.
- the invention also relates to a semiconductor chip comprising, on one side, a passivation layer in which is formed at least one opening revealing a connection pad.
- the chip comprises, on the passivation layer and the connection pad, an anisotropic conductive polymer film consisting of conductive inserts enclosed in an insulating material, a conductive insert having a first end projecting from the insulating material and one. second end brought into contact with the passivation layer or the connection pad via a conductive element.
- the anisotropic conductive film according to the invention is produced directly on a wafer of semiconductor material in which active and / or passive elements of the integrated circuit type are present. The method according to the invention ensures an excellent electrical connection between the metals brought into contact.
- the metal inserts are connected to the interconnection pads almost irreversibly thanks to a non-fusible hanging material.
- the anisotropic conductive polymer film makes it possible to make chip-substrate contacts having a low electrical resistance, a good mechanical solidity and a good reliability.
- FIGS. 1A and 1B represent the interconnection of a chip and a substrate according to the known art, using, respectively, an anisotropic conductive polymer film with conductive particles and an anisotropic conductive polymer film with conductive inserts;
- FIG. 2 represents a chip equipped with an anisotropic conductive polymer film according to the invention;
- FIGS. 3A-3I represent a method of manufacturing an anisotropic conductive polymer film on a semiconductor wafer according to the invention,
- FIGS. 4A-4F represent a variant of the manufacturing process shown in FIGS. 3A-3I.
- the same references designate the same elements. Detailed description of methods of implementing the invention
- FIG. 2 represents an example of a semiconductor chip equipped with an anisotropic conductive polymer film according to the invention.
- a chip 10 is provided with an interconnection pad 11 placed in an opening of a passivation layer 12.
- a conductive film 13 comprising a layer of insulating material 14 in which are placed conductive inserts 15 covers the passivation layer 12 and the connection pad 11.
- a metal insert 15 has a first end which projects from the insulating film 14 and a second end connected by a conductive element 16 to the passivation layer 12 or to the conductive stud 11.
- the conductive element 16 consists of a metal pad 17 and a hooking element 18.
- the method is implemented from a slice 'of semiconductor material.
- a semiconductor wafer T is covered, on one side, with a passivation layer 12 in which are made openings revealing connection pads 11 (cf. FIG. 3A).
- the first step of the process is the deposition in full layer of a conductive and adherent material 19 on the passivation layer 12 and the connection pads 11 (cf. FIG. 3B).
- the conductive and adherent material 19 is, for example, Ti, Cr, W, Ta, etc. This step is preferably carried out after pickling the surface of the pads.
- the deposition of at least one metallic layer 20 (Cu, Ni, Ti, Au, Al, etc.) is then carried out on the layer 19 (see Figure 3C).
- the metal layer 20 is intended to serve as an electric current supply layer at the time of the electrolytic growth of the conductive inserts.
- a layer of photosensitive polymer 21 of the resin type is then deposited on the metal layer 20 (cf. FIG. 3D).
- the thickness of the photosensitive polymer layer 21 is between a few ⁇ m and several tens of ⁇ m.
- the layer 21 is then exposed through a mask in order to form through holes 22 (cf. FIG. 3E).
- the holes can have a depth of a few ⁇ m to several tens of ⁇ m, depending on the thickness ' of the layer 21.
- the mask allowing the formation of the holes ensures a homogeneous and redundant distribution of these.
- the holes are then filled with one or more conductive materials (Cu, Ni, Ti, Cr, W, SnPb, Au, Ag, etc.), for example electrolytically, to form conductive inserts 23 (cf. FIG. 3F) .
- the resin is then removed, for example by dissolution, (see Figure 3G).
- the layer of conductive and adherent material 19 and the metallic layer 20 constitute a conductive layer which is then selectively etched in the zones situated between the inserts (cf. FIG. 3H).
- the etched layers 19 and 20 then form the conductive elements 16, each element 16 comprising a metal patch 17 coming from the metal layer 20 and a hooking element 18 coming from the layer 19.
- the connection pads 11 are then ' electrically isolated one another.
- This step can be accomplished by dry or chemical means, the latter being preferred.
- An insulating material 24 is deposited on the plate, partially covering the metal inserts (cf. FIG. 31). In the case where the insulating material completely covers the inserts, an engraving is carried out to update them.
- This material is preferably a polymer such as a polyimide, a thermoplastic material, a photosensitive resin or any type of adhesive. It is also possible to spread a fusible glass commonly called "Spin On Glass".
- the conductive inserts have a pointed end allowing an improvement in the electrical contact of the anisotropic conductive polymer film and of the substrates on which it is desired to carry the chips.
- the method according to the variant of the invention comprises additional steps between the step of forming the conductive inserts (cf. FIG. 3F) and the step of removing the photosensitive polymer layer (cf. FIG. 3G).
- the step of forming the conductive inserts is followed here by the deposition of a photosensitive resin 25 on all of the inserts (cf. FIG. 4A).
- the photosensitive resin is exposed through a mask so that only one resin pellet 26 remains at the top of each insert (cf. FIG. 4B). Isotropic etching, for example wet or dry
- inserts are then produced (cf. FIG. 4C) until the resin pellets are removed
- an anisotropic conductive polymer film produced directly on a chip considerably simplifies the method of hybridization of the chip on a substrate. Indeed, it is no longer necessary to manipulate a film to interpose it between the chip and the substrate. Only two elements are to be handled, the chip and the substrate. In addition, thanks to the bonding layer present under the inserts, the electrical contact of the anisotropic conductive polymer film on the chip is of very good quality. Other advantages of the method according to the invention can be emphasized. Thus, the production of an anisotropic conductive polymer film according to the method of the invention does not require a critical alignment step since the redundancy of the holes made during the etching step (cf. FIG.
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- 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)
- Non-Insulated Conductors (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03748222A EP1523762A2 (fr) | 2002-07-24 | 2003-07-22 | Procede de fabrication de film polymere conducteur anisotrope sur tranche de semi-conducteur |
US10/488,939 US7026239B2 (en) | 2002-07-24 | 2003-07-22 | Method for making an anisotropic conductive polymer film on a semiconductor wafer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0209378A FR2842943B1 (fr) | 2002-07-24 | 2002-07-24 | Procede de fabrication de film polymere conducteur anisotrope sur tranche de semi-conducteur |
FR02/09378 | 2002-07-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004012226A2 true WO2004012226A2 (fr) | 2004-02-05 |
WO2004012226A3 WO2004012226A3 (fr) | 2004-04-08 |
Family
ID=30011435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2003/002312 WO2004012226A2 (fr) | 2002-07-24 | 2003-07-22 | Procede de fabrication de film polymere conducteur anisotrope sur tranche de semi-conducteur |
Country Status (4)
Country | Link |
---|---|
US (1) | US7026239B2 (fr) |
EP (1) | EP1523762A2 (fr) |
FR (1) | FR2842943B1 (fr) |
WO (1) | WO2004012226A2 (fr) |
Cited By (11)
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US11608486B2 (en) | 2015-07-02 | 2023-03-21 | Terumo Bct, Inc. | Cell growth with mechanical stimuli |
US11613727B2 (en) | 2010-10-08 | 2023-03-28 | Terumo Bct, Inc. | Configurable methods and systems of growing and harvesting cells in a hollow fiber bioreactor system |
US11624046B2 (en) | 2017-03-31 | 2023-04-11 | Terumo Bct, Inc. | Cell expansion |
US11629332B2 (en) | 2017-03-31 | 2023-04-18 | Terumo Bct, Inc. | Cell expansion |
US11634677B2 (en) | 2016-06-07 | 2023-04-25 | Terumo Bct, Inc. | Coating a bioreactor in a cell expansion system |
US11667876B2 (en) | 2013-11-16 | 2023-06-06 | Terumo Bct, Inc. | Expanding cells in a bioreactor |
US11667881B2 (en) | 2014-09-26 | 2023-06-06 | Terumo Bct, Inc. | Scheduled feed |
US11685883B2 (en) | 2016-06-07 | 2023-06-27 | Terumo Bct, Inc. | Methods and systems for coating a cell growth surface |
US11795432B2 (en) | 2014-03-25 | 2023-10-24 | Terumo Bct, Inc. | Passive replacement of media |
US11965175B2 (en) | 2016-05-25 | 2024-04-23 | Terumo Bct, Inc. | Cell expansion |
US12043823B2 (en) | 2021-03-23 | 2024-07-23 | Terumo Bct, Inc. | Cell capture and expansion |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8518304B1 (en) | 2003-03-31 | 2013-08-27 | The Research Foundation Of State University Of New York | Nano-structure enhancements for anisotropic conductive material and thermal interposers |
FR2857780B1 (fr) * | 2003-07-18 | 2005-09-09 | Commissariat Energie Atomique | Procede de fabrication de film conducteur anisotrope sur un substrat |
FR2866753B1 (fr) * | 2004-02-25 | 2006-06-09 | Commissariat Energie Atomique | Dispositif microelectronique d'interconnexion a tiges conductrices localisees |
US7785494B2 (en) * | 2007-08-03 | 2010-08-31 | Teamchem Company | Anisotropic conductive material |
KR101485105B1 (ko) * | 2008-07-15 | 2015-01-23 | 삼성전자주식회사 | 반도체 패키지 |
KR101513642B1 (ko) * | 2013-08-21 | 2015-04-20 | 엘지전자 주식회사 | 반도체 디바이스 |
JP6412587B2 (ja) * | 2014-12-19 | 2018-10-24 | 富士フイルム株式会社 | 多層配線基板 |
KR102608888B1 (ko) * | 2019-06-04 | 2023-12-01 | (주)포인트엔지니어링 | 전기접속용 양극산화막 및 광소자 디스플레이 및 광소자 디스플레이 제조 방법 |
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WO1999005717A1 (fr) * | 1997-07-22 | 1999-02-04 | Commissariat A L'energie Atomique | Procede de fabrication d'un film conducteur anisotrope a inserts conducteurs |
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US6803303B1 (en) * | 2002-07-11 | 2004-10-12 | Micron Technology, Inc. | Method of fabricating semiconductor component having encapsulated, bonded, interconnect contacts |
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2002
- 2002-07-24 FR FR0209378A patent/FR2842943B1/fr not_active Expired - Fee Related
-
2003
- 2003-07-22 EP EP03748222A patent/EP1523762A2/fr not_active Withdrawn
- 2003-07-22 WO PCT/FR2003/002312 patent/WO2004012226A2/fr active Application Filing
- 2003-07-22 US US10/488,939 patent/US7026239B2/en not_active Expired - Fee Related
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US5879530A (en) * | 1994-10-28 | 1999-03-09 | Commissariat A L'energie Atomique | Anisotropic conductive film for microconnections |
WO1999005717A1 (fr) * | 1997-07-22 | 1999-02-04 | Commissariat A L'energie Atomique | Procede de fabrication d'un film conducteur anisotrope a inserts conducteurs |
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Cited By (18)
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US11746319B2 (en) | 2010-10-08 | 2023-09-05 | Terumo Bct, Inc. | Customizable methods and systems of growing and harvesting cells in a hollow fiber bioreactor system |
US11613727B2 (en) | 2010-10-08 | 2023-03-28 | Terumo Bct, Inc. | Configurable methods and systems of growing and harvesting cells in a hollow fiber bioreactor system |
US11773363B2 (en) | 2010-10-08 | 2023-10-03 | Terumo Bct, Inc. | Configurable methods and systems of growing and harvesting cells in a hollow fiber bioreactor system |
US11667876B2 (en) | 2013-11-16 | 2023-06-06 | Terumo Bct, Inc. | Expanding cells in a bioreactor |
US11708554B2 (en) | 2013-11-16 | 2023-07-25 | Terumo Bct, Inc. | Expanding cells in a bioreactor |
US11795432B2 (en) | 2014-03-25 | 2023-10-24 | Terumo Bct, Inc. | Passive replacement of media |
US12065637B2 (en) | 2014-09-26 | 2024-08-20 | Terumo Bct, Inc. | Scheduled feed |
US11667881B2 (en) | 2014-09-26 | 2023-06-06 | Terumo Bct, Inc. | Scheduled feed |
US11608486B2 (en) | 2015-07-02 | 2023-03-21 | Terumo Bct, Inc. | Cell growth with mechanical stimuli |
US11965175B2 (en) | 2016-05-25 | 2024-04-23 | Terumo Bct, Inc. | Cell expansion |
US11634677B2 (en) | 2016-06-07 | 2023-04-25 | Terumo Bct, Inc. | Coating a bioreactor in a cell expansion system |
US11685883B2 (en) | 2016-06-07 | 2023-06-27 | Terumo Bct, Inc. | Methods and systems for coating a cell growth surface |
US11999929B2 (en) | 2016-06-07 | 2024-06-04 | Terumo Bct, Inc. | Methods and systems for coating a cell growth surface |
US12077739B2 (en) | 2016-06-07 | 2024-09-03 | Terumo Bct, Inc. | Coating a bioreactor in a cell expansion system |
US11702634B2 (en) | 2017-03-31 | 2023-07-18 | Terumo Bct, Inc. | Expanding cells in a bioreactor |
US11629332B2 (en) | 2017-03-31 | 2023-04-18 | Terumo Bct, Inc. | Cell expansion |
US11624046B2 (en) | 2017-03-31 | 2023-04-11 | Terumo Bct, Inc. | Cell expansion |
US12043823B2 (en) | 2021-03-23 | 2024-07-23 | Terumo Bct, Inc. | Cell capture and expansion |
Also Published As
Publication number | Publication date |
---|---|
EP1523762A2 (fr) | 2005-04-20 |
FR2842943A1 (fr) | 2004-01-30 |
WO2004012226A3 (fr) | 2004-04-08 |
FR2842943B1 (fr) | 2005-07-01 |
US20040241932A1 (en) | 2004-12-02 |
US7026239B2 (en) | 2006-04-11 |
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