EP1535339A2 - Integrierte fotoempfindliche strukturen und passivierungsverfahren - Google Patents
Integrierte fotoempfindliche strukturen und passivierungsverfahrenInfo
- Publication number
- EP1535339A2 EP1535339A2 EP03750301A EP03750301A EP1535339A2 EP 1535339 A2 EP1535339 A2 EP 1535339A2 EP 03750301 A EP03750301 A EP 03750301A EP 03750301 A EP03750301 A EP 03750301A EP 1535339 A2 EP1535339 A2 EP 1535339A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- cmos
- last
- bicmos
- integrated
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000002161 passivation Methods 0.000 title claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 65
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 20
- 229910052710 silicon Inorganic materials 0.000 claims description 20
- 239000010703 silicon Substances 0.000 claims description 20
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 13
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 5
- 239000002356 single layer Substances 0.000 claims description 5
- 238000001465 metallisation Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 description 5
- 235000012431 wafers Nutrition 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005247 gettering Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 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
- H01L31/0216—Coatings
- H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02162—Coatings for devices characterised by at least one potential jump barrier or surface barrier for filtering or shielding light, e.g. multicolour filters for photodetectors
Definitions
- CMOS-based camera chips are an alternative to CCD cameras.
- a major problem lies in the fact that the insulating cover layers of silicon oxide and silicon nitride lying on the finished processed silicon wafer are in principle transparent to light in the visible wavelength range, but their thickness is not adapted, so that there is a loss of intensity.
- three to five and sometimes even more different layers lie on top of one another, which give a total layer thickness of 1 ⁇ m to 3 ⁇ m and more.
- the thickness of this layer structure is therefore of the order of magnitude of the light wavelength (up to a few multiples), so that the interference of thin layers, depending on the wavelength and the current layer thickness, can reduce the proportion of the light passing through.
- the normal process tolerance of the thickness during the layer deposition (+ 10%) on a single silicon wafer can result in areas of maximum transmission and also areas of maximum reflection, i.e.
- the amount of light transmitted by a monochromatic light source that arrives in the photodiode can fluctuate up to 40% based on a silicon wafer.
- the invention achieves an improvement in CMOS / BiCMOS technologies with integrated photosensitive structures in terms of costs by increasing the yield and by minimizing the additional manufacturing effort.
- the task is solved in such a way that the last layer of the usual finishing layer system with a defined thickness and high tolerance was applied as the only layer over the areas of the photosensitive structures.
- An unavoidable tolerance of the thickness after the deposition (generally ⁇ 10%) does not lead from amplification to extinguishing the continuous light.
- CMOS or BiCMOS process runs unchanged up to and including the last metallization.
- the layer system usually to be deposited afterwards has to fulfill several tasks:
- the silicon oxynitride is deposited as standard (if this is to getter, getter centers can be introduced). This is followed by a photolithographic process in which the at least one light-sensitive area is exposed. All layers above the silicon surface are removed in the area of the photosensitive structure (s), which is possible with sufficient precision due to the Si0 2 / Si interface. It goes without saying that the openings of the photomask must be at a sufficiently large distance from metal interconnects and from the pn junctions that meet the surface (pn junctions must not be exposed).
- the final silicon nitride layer is then deposited with a preferred layer thickness of 260 nm.
- the layer of this thickness has a transmission for wavelengths of 410 nm and 700 nm Maximum (see Figure 1). Together with the sensitivity curve of the silicon, there is a broad, unimpaired sensitivity of the photodetectors without any notable spectral reduction in the visible range (eg n-well / p-substrate, see FIG. 2).
- the layer thickness can be modified so that maximum transmission occurs for a given wavelength. Layer thickness tolerances of around 10% have only a marginal influence.
- silicon nitride on silicon on the finished CMOS chip does not cause any problems with regard to mechanical stress, especially since there are no significant thermal loads.
- the passivation tasks are proven to be fulfilled without restrictions.
- This silicon nitride layer is normally followed by a structuring of bond pads.
- FIG. 1 is a transmission behavior for the optical layer 2.
- Figure 2 is a sensitivity function for the same layer 2 in silicon.
- Figure 3 is an example of a detail from an IS (IC).
- a layer system 3 which is usually to be deposited thereafter has to fulfill several tasks: electrical insulation from the environment, mechanical protection, protection against moisture and possibly also gettering action (e.g. by means of built-in phosphorus).
- a conventional double-layer system consisting of a first layer of silicon oxynitride, followed by a layer of silicon nitride, is assumed.
- the silicon oxynitride is deposited (if this is to be “gettered”, getter centers can be introduced). This is followed by a photolithographic process in which the at least one light-sensitive region 1 is exposed. All layers above the silicon surface A are removed in the area of the photosensitive structure (s), which is possible with sufficient precision due to the SiO 2 / Si interface. It goes without saying that openings in the photomask are at a sufficiently large distance from metal interconnects and from the pn junctions abutting the surface (pn junctions must not be exposed).
- the final silicon nitride layer 2 is then deposited with a preferred layer thickness of essentially 260 nm.
- the layer of this thickness has, for example, a transmission maximum for wavelengths from 410 nm to 700 nm, see FIG. 1. Together with the sensitivity curve of the silicon, this results in a broad, unimpaired sensitivity of the photodetectors without any significant spectral reduction in the visible range, e.g. n-well / p-substrate, see FIG. 2.
- the layer thickness "d" of layer 2 can be modified so that maximum transmission occurs for a given wavelength.
- Layer thickness tolerances of around 10% have only a marginal influence. Investigations have shown that silicon nitride on silicon on the finished CMOS chip does not cause any problems with regard to mechanical stress, especially since there are no significant thermal loads. The tasks of passivation 3 are proven to be fulfilled without restrictions.
- the silicon nitride layer 2 is normally followed by a structuring of bond pads.
- photosensitive structure e.g. Photodiode.
- d defined optical thickness i.e. defined thickness * refractive index
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Light Receiving Elements (AREA)
- Formation Of Insulating Films (AREA)
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002139643 DE10239643B3 (de) | 2002-08-29 | 2002-08-29 | Verfahren zur Passivierung von CMOS- oder BiCMOS-IC's mit integrierten fotoempfindlichen Strukturen |
DE10239643 | 2002-08-29 | ||
DE2002139642 DE10239642B3 (de) | 2002-08-29 | 2002-08-29 | Anordnung und Prozeßfolge zur Minimierung von Lichtverlusten und zur elektronischen Abschirmung an integrierten Fotodioden |
DE10239642 | 2002-08-29 | ||
PCT/DE2003/002873 WO2004021452A2 (de) | 2002-08-29 | 2003-08-29 | Integrierte fotoempfindliche strukturen und passivierungsverfahren |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1535339A2 true EP1535339A2 (de) | 2005-06-01 |
Family
ID=31979459
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03753262A Expired - Lifetime EP1532691B1 (de) | 2002-08-29 | 2003-08-29 | Minimierung von lichtverlusten und elektronische abschirmung an integrierten fotodioden |
EP03750301A Withdrawn EP1535339A2 (de) | 2002-08-29 | 2003-08-29 | Integrierte fotoempfindliche strukturen und passivierungsverfahren |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03753262A Expired - Lifetime EP1532691B1 (de) | 2002-08-29 | 2003-08-29 | Minimierung von lichtverlusten und elektronische abschirmung an integrierten fotodioden |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP1532691B1 (de) |
AT (1) | ATE422712T1 (de) |
AU (2) | AU2003271515A1 (de) |
DE (3) | DE10393329D2 (de) |
WO (1) | WO2004021453A2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100377360C (zh) * | 2004-04-14 | 2008-03-26 | 亚泰影像科技股份有限公司 | 影像感测器 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06120553A (ja) * | 1992-09-30 | 1994-04-28 | New Japan Radio Co Ltd | ホトダイオード |
JP3900552B2 (ja) * | 1996-07-11 | 2007-04-04 | 株式会社デンソー | 光センサの製造方法 |
AU5354698A (en) * | 1996-11-01 | 1998-05-29 | Lawrence Berkeley Laboratory | Low-resistivity photon-transparent window attached to photo-sensitive silicon detector |
JP2908366B2 (ja) * | 1996-12-25 | 1999-06-21 | 山形日本電気株式会社 | 半導体装置の製造方法 |
TW504849B (en) * | 1997-02-25 | 2002-10-01 | Matsushita Electric Ind Co Ltd | Optical receiver |
US6043115A (en) * | 1999-03-25 | 2000-03-28 | United Microelectronics Corp. | Method for avoiding interference in a CMOS sensor |
US6407440B1 (en) * | 2000-02-25 | 2002-06-18 | Micron Technology Inc. | Pixel cell with high storage capacitance for a CMOS imager |
DE10024473B4 (de) * | 2000-05-18 | 2007-04-19 | Vishay Semiconductor Gmbh | Optischer Empfänger |
-
2003
- 2003-08-29 AU AU2003271515A patent/AU2003271515A1/en not_active Abandoned
- 2003-08-29 EP EP03753262A patent/EP1532691B1/de not_active Expired - Lifetime
- 2003-08-29 WO PCT/DE2003/002874 patent/WO2004021453A2/de not_active Application Discontinuation
- 2003-08-29 DE DE10393329T patent/DE10393329D2/de not_active Withdrawn - After Issue
- 2003-08-29 AU AU2003269691A patent/AU2003269691A1/en not_active Abandoned
- 2003-08-29 EP EP03750301A patent/EP1535339A2/de not_active Withdrawn
- 2003-08-29 DE DE10393435T patent/DE10393435D2/de not_active Expired - Fee Related
- 2003-08-29 AT AT03753262T patent/ATE422712T1/de not_active IP Right Cessation
- 2003-08-29 DE DE50311172T patent/DE50311172D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO2004021452A3 * |
Also Published As
Publication number | Publication date |
---|---|
AU2003271515A8 (en) | 2004-03-19 |
WO2004021453A2 (de) | 2004-03-11 |
DE10393435D2 (de) | 2005-06-16 |
AU2003269691A1 (en) | 2004-03-19 |
EP1532691A2 (de) | 2005-05-25 |
EP1532691B1 (de) | 2009-02-11 |
AU2003269691A8 (en) | 2004-03-19 |
DE10393329D2 (de) | 2005-06-16 |
AU2003271515A1 (en) | 2004-03-19 |
ATE422712T1 (de) | 2009-02-15 |
WO2004021453A3 (de) | 2004-06-10 |
DE50311172D1 (de) | 2009-03-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE10230134B4 (de) | Bildsensor und Verfahren zu dessen Herstellung | |
DE102011055767B4 (de) | Halbleitervorrichtung mit Bonding-Fläche und Verfahren zur Herstellung derselben | |
TWI238525B (en) | Solid-state imaging device, solid-state imaging apparatus and methods for manufacturing the same | |
DE102018118613B4 (de) | Halbleiter-Bildsensor | |
DE202012013576U1 (de) | Festkörper-Bildaufnahmeeinheit und elektronische Vorrichtung | |
DE102010040275A1 (de) | Antireflex-Bildsensor und Verfahren zur Herstellung desselben | |
DE4433846A1 (de) | Verfahren zur Herstellung einer vertikalen integrierten Schaltungsstruktur | |
DE102018116281B4 (de) | Photoelektrisches umwandlungsgerät, ausrüstung mit photoelektrischem umwandlungsgerät und herstellungsverfahren für ein photoelektrisches umwandlungsgerät | |
DE102007051752B4 (de) | Licht blockierende Schichtenfolge und Verfahren zu deren Herstellung | |
DE69126388T2 (de) | Optische Halbleiter-Aufnahmevorrichtung und deren Herstellungsprozess | |
DE112013002560B4 (de) | Spektralsensor | |
WO2004021452A2 (de) | Integrierte fotoempfindliche strukturen und passivierungsverfahren | |
DE102006027969A1 (de) | Verfahren zur selektiven Entspiegelung einer Halbleitergrenzfläche durch eine besondere Prozessführung | |
DE102007058384A1 (de) | Bildsensor und Verfahren zu dessen Herstellung | |
DE102008023459A1 (de) | Verfahren zur Herstellung eines Bildsensors | |
DE102009037419A1 (de) | Bildsensor und Verfahren zu seiner Herstellung | |
DE10345453B4 (de) | Verfahren zum Herstellen eines optischen Sensors mit einer integrierten Schichtstapel-Anordnung | |
DE10031439A1 (de) | Halbleiterbildsensor mit darin enthaltener optischer Schicht | |
DE10239643B3 (de) | Verfahren zur Passivierung von CMOS- oder BiCMOS-IC's mit integrierten fotoempfindlichen Strukturen | |
DE102020110871B4 (de) | Halbleitervorrichtung zur Lichtdetektion | |
EP1535339A2 (de) | Integrierte fotoempfindliche strukturen und passivierungsverfahren | |
DE10239642B3 (de) | Anordnung und Prozeßfolge zur Minimierung von Lichtverlusten und zur elektronischen Abschirmung an integrierten Fotodioden | |
DE102007040870A1 (de) | Bildsensor und Verfahren zu dessen Herstellung | |
DE10328327A1 (de) | Bildgebungsarray und Verfahren zur Herstellung desselben | |
DE112019002845T5 (de) | Festkörperbildgebungsvorrichtung, verfahren zur herstellung der festkörperbildgebungsvorrichtung und elektronisches gerät |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20050324 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1074914 Country of ref document: HK |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20080814 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20081230 |
|
REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1074914 Country of ref document: HK |