EP1147559A1 - Dispositif de protection contre les decharges electrostatiques pour composants microelectroniques sur substrat du type soi - Google Patents
Dispositif de protection contre les decharges electrostatiques pour composants microelectroniques sur substrat du type soiInfo
- Publication number
- EP1147559A1 EP1147559A1 EP00901665A EP00901665A EP1147559A1 EP 1147559 A1 EP1147559 A1 EP 1147559A1 EP 00901665 A EP00901665 A EP 00901665A EP 00901665 A EP00901665 A EP 00901665A EP 1147559 A1 EP1147559 A1 EP 1147559A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- zone
- conductivity
- type
- substrate
- semiconductor layer
- 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- Withdrawn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
- 239000000758 substrate Substances 0.000 title claims abstract description 46
- 230000004224 protection Effects 0.000 title claims description 58
- 238000004377 microelectronic Methods 0.000 title description 4
- 239000004065 semiconductor Substances 0.000 claims abstract description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 19
- 229910052710 silicon Inorganic materials 0.000 claims description 19
- 239000010703 silicon Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000001465 metallisation Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 229910021332 silicide Inorganic materials 0.000 claims description 3
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims description 2
- 230000010287 polarization Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 31
- 238000002513 implantation Methods 0.000 description 26
- 239000002344 surface layer Substances 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 6
- 230000002441 reversible effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 5
- 229920005591 polysilicon Polymers 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 230000001052 transient effect Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D8/00—Diodes
- H10D8/01—Manufacture or treatment
- H10D8/021—Manufacture or treatment of breakdown diodes
- H10D8/022—Manufacture or treatment of breakdown diodes of Zener diodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D8/00—Diodes
- H10D8/20—Breakdown diodes, e.g. avalanche diodes
- H10D8/25—Zener diodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/01—Manufacture or treatment
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/201—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates the substrates comprising an insulating layer on a semiconductor body, e.g. SOI
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D89/00—Aspects of integrated devices not covered by groups H10D84/00 - H10D88/00
- H10D89/60—Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD]
- H10D89/601—Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD] for devices having insulated gate electrodes, e.g. for IGFETs or IGBTs
- H10D89/611—Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD] for devices having insulated gate electrodes, e.g. for IGFETs or IGBTs using diodes as protective elements
Definitions
- the present invention relates to a device for protecting against electrostatic discharges for electronic components.
- ] _ Q produced on a substrate comprising a semiconductor layer on an insulating layer, for example an SOI substrate.
- ESD electrostatic discharge
- the switch analogy is an ideal case that we are trying to get close to.
- a protection is characterized by its voltage for maintaining the electrical characteristic in triggered mode and its series resistance. Optimizing a protection therefore amounts to finding a structure of minimum bulk, having a minimum series resistance and whose holding voltage, while being greater than the operating voltage of the circuit, is minimum.
- the reduction in the area occupied by the protective structure and the reduction in its resistance are generally contradictory and a compromise must be reached between these two factors.
- the holding voltage is defined as a first approximation by the diode bend voltage (about 0.7 V) that multiplies the number of diodes in series.
- each protection diode is produced in a box of doping type opposite to that of the substrate, each box being isolated from the others, the diodes then being connected in series. Due to the fact that the substrate is massive, each parasitic bipolar transistor is linked to each protection diode. The leakage current of a protection diode corresponds to the base current of the transistor linked to the next protection diode and the leakage current is amplified accordingly.
- Document WO 97/35373 proposes a solution to this problem by decorrelating the functions of insulation and protection. The Darlington effect is taken advantage of to ensure the discharge function of the electrostatic discharge.
- the size of the first diode is maximized because it receives the largest part of the discharge.
- the isolation function is then assumed by a MOS transistor connected in series with the last protection diode.
- the Darlington effect does not occur in microelectronic circuits produced on SOI (silicon-on-insulator) substrates since the parasitic bipolar transistors are suppressed. On these substrates, protection by diodes in series can therefore be applied.
- the most compact diode that can be used consists of an NMOS transistor with an implantation of the source of a different type from the implantation of the drain.
- Certain manufacturing techniques require a small thickness of silicon on the buried oxide layer, the diodes formed then have a high resistance.
- the area under the grid of a protective diode may melt since the heat produced cannot be dissipated easily.
- the invention provides a solution to the problem of circuit protection microelectronics developed on SOI type substrates. It applies to the very specific context of low-consumption integrated circuit techniques.
- the general principle of the invention is to use a device which, moreover, has very poor reverse withstand performance and cannot be used as it is in a circuit due to the leaks it causes.
- This device is a Zener type diode. By this term is meant a diode having a low avalanche voltage. Its poor behavior in reverse turns out not to be penalizing in the case of the invention since the diode will always be polarized directly.
- the Zener diode used according to the present invention is a diode formed by the junction of two opposite and high doping zones.
- the direct and reverse characteristics are degraded and make it an unusable diode in an application usually reserved for this type of diode. Indeed, its conduction level at given voltage is increased while its blocking aspect, when it is reverse biased, disappears. Leakage at low bias voltage is also higher compared to a conventional diode.
- the advantage of Zener diodes is that their intrinsic voltage withstand under electrostatic discharge is high. This is particularly true in the case of a thinned substrate (see Figure 7). In addition, they have a lower series resistance and a gain multiplied by 3. These two parameters are essential to optimize protection.
- the subject of the invention is therefore a device for protecting an electronic component against electrostatic discharges, the device being developed in a semiconductor layer of a substrate, the semiconductor layer covering an insulating layer, the device being connected to a contact pad to be protected from said component in order to derive any electrostatic discharge, characterized in that the device comprises at minus a Zener diode connected to said pad to be polarized directly.
- this device comprises several Zener diodes connected in series and connected to said pad to be polarized directly.
- the Zener diodes can be arranged adjacent to form the series connection, the electrical connection between two adjacent diodes being obtained by metallization or by a silicide.
- each Zener diode comprises two regions heavily doped with opposite types of conductivity, these two regions being separated by a region doped at an average level according to one or the other of said types of conductivity.
- the semiconductor layer of the substrate is a silicon layer
- the two heavily doped regions have doping levels of the order of 10 20 atoms / cm 3
- the doped region at a medium level has a level of doping of the order of 10 18 atoms / cm 3 .
- This substrate can be an SOI substrate.
- the subject of the invention is also a method for producing a device for protecting an electronic component against electrostatic discharges, the protection device comprising at least one Zener diode produced in a semiconductor layer of a substrate, the semiconductor layer covering an insulating layer, the method comprising:
- a step of implanting a first zone of said active zone in order to obtain a first zone moderately doped according to a type of conductivity chosen between a first type of conductivity and a second type of conductivity opposite to the first type of conductivity,
- Another subject of the invention is a method for producing a device for protecting an electronic component against electrostatic discharges, the protection device comprising at least one Zener diode produced in a semiconductor layer of a substrate, the semiconductor layer covering an insulating layer, the method comprising: a step of defining the area of the diode or active area in said semiconductor layer,
- the first zone is wider than the grid formed on this first zone.
- FIG. 1 shows, schematically, the constitution of a Zener diode usable in the protection device according to the invention
- FIG. 2 is a descriptive view of the implantation of a Zener diode on a very thin layer of a substrate, usable in the protection device according to the invention
- - Figure 3 is a descriptive view of the implantation of a Zener diode on a thin layer of a substrate, usable in the protection device 1 according to the invention
- FIG. 4 shows an electronic circuit protected by protection devices 1 according to the invention
- FIG. 5 shows one implantation of a set of four Zener diodes mounted in series on a very thin layer of a substrate, for a protection device according to the invention
- - Figure 6 shows the layout of a set of four Zener diodes mounted in series on a thin layer of a substrate, for a protection device according to one invention
- - Figure 7 is a cross-sectional view of a MOS transistor according to the known art
- FIGS. 8 to 11 are cross-sectional views of an SOI substrate during different stages of manufacturing a Zener diode for a protection device according to the invention.
- FIG. 1 shows, schematically, the constitution of a Zener diode usable in the protection device according to the invention.
- This Zener diode is made from monocrystalline silicon using two high level source and drain type implantations which allow levels to be reached. doping of the order of 10 20 atoms / cm 3 . These two opposite types of implantations, N ++ for region 1 and P ++ for region 2, are separated by an intermediate level implantation of type N or P in region 3 of the order of 10 18 atoms / cm 3 .
- This diode is specific by its design and its low resistance. The realization of this Zener diode varies according to the techniques used.
- the low intrinsic resistance of the protection diode is explained in part by the lower thickness of silicon due to localized thinning. Furthermore, the weakly doped areas, located under the spacers, can induce a high series resistance of the diode, in particular for the implantations corresponding to the PMOS transistor.
- each Zener diode of the protection device in the following manner.
- the masking level of the polysilicon grid is not used.
- the implantation level used for the spacers of the NMOS transistor (weakly N-doped drain or LDDN) is dissociated from the drain and source N level (DSN).
- the source drain level P (DSP), which is normally the complement of the DSN level, becomes the complement of the two levels DSN and LDDN.
- FIG. 2 is a descriptive view of the implantation of a Zener diode on a very thin layer of a substrate.
- an active silicon area 5 is defined in the silicon surface layer of an SOI substrate.
- the DSP level is complementary to the DSN and LDDN levels.
- the intrinsic resistance is a value used in the standardized test for protection against electrostatic discharges called HBM (for "Human Body Model”).
- HBM Human Body Model
- This test was defined by assimilating a person to a capacitor with a capacity of 100 pF, the skin resistance varying between 500 and 50,000 ⁇ .
- This standard refers to a device connected in series with a 100 pF capacitor, a resistance of 1500 ⁇ and, implicitly, an inductance of 7.5 ⁇ H.
- HBM 2000 V
- the voltage withstand is then normalized per unit of width of the protection device.
- a voltage transient of U Volts corresponds in fact to a current transient with a maximum current of approximately U / 1500 amperes, a rise time of 5 to 10 nS and an exponential decay having a time constant of 150 nS.
- This current transient leads by Joule effect to a certain heating.
- the ESD resistance reported in volts per ⁇ m corresponds to a threshold beyond which the energy dissipated in the device leads to destructive thermal runaway.
- the thermal runaway threshold can be associated with a critical temperature which must not be crossed.
- the heating in the material during the ESD transient corresponds to a dissipation by Joule effect associated with the strong current transient.
- heating is greater for the SOI substrate than for a solid substrate because the heat cannot be as easily removed from the rear of the substrate due to the presence of the buried oxide layer.
- the increase in intrinsic strength implies an increase in the thickness of the surface silicon layer.
- an active silicon area 10 is defined in the silicon surface layer of an SOI substrate.
- an implantation level 11 of type N ++ is defined in the silicon surface layer of an SOI substrate.
- an implantation level 12 of type P ++ is defined in the silicon surface layer of an SOI substrate.
- an implantation level 13 of type N is defined in the silicon surface layer of an SOI substrate.
- the Zener diode protection device according to the invention cannot be used according to the diagram of conventional diode protection devices.
- the Zener diodes of the protection device according to the invention are directly polarized.
- FIG. 4 represents - an electronic circuit protected from electrostatic discharges by four protection devices according to the invention.
- the ground pad 21, the DC voltage supply pad 22, the input pad 23 of the circuit and the output pad 24 of the circuit are connected to protection devices 25.
- These protection devices 25 are formed by four Zener diodes connected in series and directly polarized. The number of diodes in a device must be sufficient to support the supply voltage without inducing excessive leakage.
- the protection device according to the invention can advantageously be supplemented by the addition of conventional diodes reverse biased in several places of the circuit so as to increase the effectiveness of the protection whatever the sign of the electrostatic discharge.
- the references 26 and 27 designate conventional diodes mounted in addition to certain protection devices according to the invention.
- the diodes of the protection device having to be connected in series, it is advisable to design it so as to allow the most compact integration possible.
- the four diodes are made on the same active area. If the diodes are made using an LDDN level differentiated from the DSN level (see Figure 2), these diodes can be connected to each other thanks to the metallization level. This is illustrated in FIG. 5.
- the four diodes 31, 32, 33 and 34 have been represented with their different layouts, for example for the Zener diode 33: the DSP layout 331, the DSN layout 332 and the LDDN implantation 333. Spallings 35 connect the diodes to one another and to the outside. References 36 represent the electrical contact points between diodes and metallizations.
- the diodes are produced using an LDDN type level used before the grid, the diodes can be connected by a level of silicide as illustrated in FIG. 6. An even more integrated device is then obtained.
- the four diodes are referenced 41, 42, 43 and 44.
- Each diode, for example the diode 43 comprises: a DSP implantation 431, a DSN implantation 432 and a polysilicon grid 433.
- the references 46 represent the electrical contact points of input and output of the Zener four diode protection device.
- FIG. 7 shows, in cross section, such a transistor produced on an SOI substrate formed by a solid part 50 of silicon, a layer of silicon oxide 51 and a surface layer of silicon 52. Note the localized thinning zone created in the surface layer 52. This localized thinning zone supports the layer 53 of grid oxide, the grid 54 of polysilicon and the spacers 55.
- the conventional diodes are produced according to this concept and it is obvious that the volume of silicon between the grid oxide 53 and the oxide layer 51 is too confined. The heat produced in this volume cannot be easily dissipated, unlike the elements produced on a solid silicon substrate.
- the Zener diodes can be produced by avoiding the localized thinning associated with the polysilicon grid.
- the diode is made with the only LDD level as shown in Figure 2. This is an original modification of a standard process since we use a device which, moreover, has very poor performance performance conversely and which cannot be used as is in a circuit due to the leaks it causes.
- FIGS. 8 to 11 illustrate the production of a Zener diode, for a protection device according to the invention, from an SOI substrate.
- FIG. 8 shows, in cross section, an SOI substrate composed of a solid part 60 of silicon, a layer of silicon oxide 61 and a surface layer of silicon 62.
- FIG. 9 realizes on a part of the surface layer 62 an LDDN type implantation to obtain an N + doped area 63.
- an implantation of the drain-source N type (DSN implantation) is carried out on a part of the zone 63 already doped with N + .
- An N ++ doped area 64 is obtained.
- an implantation of the drain-source type P DSP implantation
- the different zones constituting a Zener diode of the device according to the invention will have a doping greater than or equal to 1013 atoms / cm 3 .
- This Zener diode design is inexpensive because, although it obviously requires an additional reticle, the LDDN level is dissociated from the DSN level and it does not lead to a more complex production process.
- the protection function is optimized: the intrinsic resistance is increased and the voltage drop developed across the protection diode during electrostatic discharge - is minimized. This is shown in the table given above: 60% gain on the intrinsic resistance and 200% on the electrical resistance which turns out to be the most critical parameter.
- the invention provides the following advantage: when the supply voltage decreases to 1 V, using two degraded diodes connected in series, there is excellent protection with low resistance.
- the inventor of the present invention forced a priori by using this very poor quality component.
Landscapes
- Semiconductor Integrated Circuits (AREA)
- Thin Film Transistor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9901032 | 1999-01-29 | ||
| FR9901032A FR2789226B1 (fr) | 1999-01-29 | 1999-01-29 | Dispositif de protection contre les decharges electrostatiques pour composants microelectroniques sur substrat du type soi |
| PCT/FR2000/000198 WO2000045439A1 (fr) | 1999-01-29 | 2000-01-28 | Dispositif de protection contre les decharges electrostatiques pour composants microelectroniques sur substrat du type soi |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1147559A1 true EP1147559A1 (fr) | 2001-10-24 |
Family
ID=9541385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00901665A Withdrawn EP1147559A1 (fr) | 1999-01-29 | 2000-01-28 | Dispositif de protection contre les decharges electrostatiques pour composants microelectroniques sur substrat du type soi |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6969891B1 (fr) |
| EP (1) | EP1147559A1 (fr) |
| JP (1) | JP4799735B2 (fr) |
| FR (1) | FR2789226B1 (fr) |
| WO (1) | WO2000045439A1 (fr) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0738035A (ja) * | 1993-07-22 | 1995-02-07 | Toppan Printing Co Ltd | 樹脂封止電子回路装置の製造方法 |
| JP3962729B2 (ja) | 2004-06-03 | 2007-08-22 | 株式会社東芝 | 半導体装置 |
| JP4282581B2 (ja) * | 2004-09-29 | 2009-06-24 | 株式会社東芝 | 静電保護回路 |
| DE102006023429B4 (de) * | 2006-05-18 | 2011-03-10 | Infineon Technologies Ag | ESD-Schutz-Element zur Verwendung in einem elektrischen Schaltkreis |
| JP2008053693A (ja) * | 2006-07-28 | 2008-03-06 | Sanyo Electric Co Ltd | 半導体モジュール、携帯機器、および半導体モジュールの製造方法 |
| US8048753B2 (en) * | 2009-06-12 | 2011-11-01 | Globalfoundries Inc. | Charging protection device |
| WO2011093472A1 (fr) * | 2010-01-29 | 2011-08-04 | 富士電機システムズ株式会社 | Dispositif à semi-conducteurs |
| US20120127617A1 (en) * | 2010-11-24 | 2012-05-24 | Achim Werner | Electrostatic Discharge Circuit |
| US9093564B2 (en) | 2013-03-20 | 2015-07-28 | International Business Machines Corporation | Integrated passive devices for FinFET technologies |
| JP2015103605A (ja) * | 2013-11-22 | 2015-06-04 | 株式会社メガチップス | Esd保護回路 |
| US10552564B1 (en) * | 2018-06-19 | 2020-02-04 | Cadence Design Systems, Inc. | Determining worst potential failure instances using full chip ESD analysis |
| DE102020208054A1 (de) * | 2020-06-29 | 2021-12-30 | Siemens Aktiengesellschaft | Elektronikmodul |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3728591A (en) * | 1971-09-03 | 1973-04-17 | Rca Corp | Gate protective device for insulated gate field-effect transistors |
| JPS57153463A (en) * | 1981-02-27 | 1982-09-22 | Westinghouse Electric Corp | Overvoltage protecting device |
| JP2649359B2 (ja) * | 1986-10-08 | 1997-09-03 | 日本電装株式会社 | 半導体装置の製造方法 |
| JPH02185069A (ja) * | 1988-12-02 | 1990-07-19 | Motorola Inc | 高エネルギー阻止能力及び温度補償された阻止電圧を具備する半導体デバイス |
| US4982371A (en) * | 1989-05-15 | 1991-01-01 | Dallas Semiconductor Corporation | Compact electronic module having a RAM device |
| US5210846B1 (en) * | 1989-05-15 | 1999-06-29 | Dallas Semiconductor | One-wire bus architecture |
| US6330977B1 (en) * | 1989-05-15 | 2001-12-18 | Dallas Semiconductor Corporation | Electronic labeling systems and methods and electronic card systems and methods |
| US5619066A (en) * | 1990-05-15 | 1997-04-08 | Dallas Semiconductor Corporation | Memory for an electronic token |
| JP3522788B2 (ja) * | 1992-10-29 | 2004-04-26 | 株式会社ルネサステクノロジ | 半導体集積回路装置 |
| US5343053A (en) * | 1993-05-21 | 1994-08-30 | David Sarnoff Research Center Inc. | SCR electrostatic discharge protection for integrated circuits |
| JP2768265B2 (ja) * | 1994-04-15 | 1998-06-25 | 株式会社デンソー | 半導体装置 |
| US5610790A (en) * | 1995-01-20 | 1997-03-11 | Xilinx, Inc. | Method and structure for providing ESD protection for silicon on insulator integrated circuits |
| US5536958A (en) * | 1995-05-02 | 1996-07-16 | Motorola, Inc. | Semiconductor device having high voltage protection capability |
| JPH0945912A (ja) * | 1995-07-31 | 1997-02-14 | Nec Corp | 半導体装置およびその製造方法 |
| US5708288A (en) * | 1995-11-02 | 1998-01-13 | Motorola, Inc. | Thin film silicon on insulator semiconductor integrated circuit with electrostatic damage protection and method |
| US5719737A (en) | 1996-03-21 | 1998-02-17 | Intel Corporation | Voltage-tolerant electrostatic discharge protection device for integrated circuit power supplies |
| JP3717227B2 (ja) * | 1996-03-29 | 2005-11-16 | 株式会社ルネサステクノロジ | 入力/出力保護回路 |
| US6157530A (en) * | 1999-01-04 | 2000-12-05 | International Business Machines Corporation | Method and apparatus for providing ESD protection |
| TW446192U (en) * | 2000-05-04 | 2001-07-11 | United Microelectronics Corp | Electrostatic discharge protection circuit |
-
1999
- 1999-01-29 FR FR9901032A patent/FR2789226B1/fr not_active Expired - Fee Related
-
2000
- 2000-01-28 JP JP2000596603A patent/JP4799735B2/ja not_active Expired - Fee Related
- 2000-01-28 WO PCT/FR2000/000198 patent/WO2000045439A1/fr not_active Ceased
- 2000-01-28 US US09/889,558 patent/US6969891B1/en not_active Expired - Fee Related
- 2000-01-28 EP EP00901665A patent/EP1147559A1/fr not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0045439A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2789226A1 (fr) | 2000-08-04 |
| JP4799735B2 (ja) | 2011-10-26 |
| FR2789226B1 (fr) | 2002-06-14 |
| US6969891B1 (en) | 2005-11-29 |
| JP2002538598A (ja) | 2002-11-12 |
| WO2000045439A1 (fr) | 2000-08-03 |
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