WO2008093854A1 - 薄膜半導体装置の製造方法および薄膜半導体装置 - Google Patents
薄膜半導体装置の製造方法および薄膜半導体装置 Download PDFInfo
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- WO2008093854A1 WO2008093854A1 PCT/JP2008/051696 JP2008051696W WO2008093854A1 WO 2008093854 A1 WO2008093854 A1 WO 2008093854A1 JP 2008051696 W JP2008051696 W JP 2008051696W WO 2008093854 A1 WO2008093854 A1 WO 2008093854A1
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Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having potential barriers
- H10K10/40—Organic transistors
- H10K10/46—Field-effect transistors, e.g. organic thin-film transistors [OTFT]
- H10K10/462—Insulated gate field-effect transistors [IGFETs]
- H10K10/468—Insulated gate field-effect transistors [IGFETs] characterised by the gate dielectrics
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having potential barriers
- H10K10/40—Organic transistors
- H10K10/46—Field-effect transistors, e.g. organic thin-film transistors [OTFT]
- H10K10/462—Insulated gate field-effect transistors [IGFETs]
- H10K10/466—Lateral bottom-gate IGFETs comprising only a single gate
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having potential barriers
- H10K10/40—Organic transistors
- H10K10/46—Field-effect transistors, e.g. organic thin-film transistors [OTFT]
- H10K10/462—Insulated gate field-effect transistors [IGFETs]
- H10K10/468—Insulated gate field-effect transistors [IGFETs] characterised by the gate dielectrics
- H10K10/474—Insulated gate field-effect transistors [IGFETs] characterised by the gate dielectrics the gate dielectric comprising a multilayered structure
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having potential barriers
- H10K10/40—Organic transistors
- H10K10/46—Field-effect transistors, e.g. organic thin-film transistors [OTFT]
- H10K10/462—Insulated gate field-effect transistors [IGFETs]
- H10K10/468—Insulated gate field-effect transistors [IGFETs] characterised by the gate dielectrics
- H10K10/474—Insulated gate field-effect transistors [IGFETs] characterised by the gate dielectrics the gate dielectric comprising a multilayered structure
- H10K10/476—Insulated gate field-effect transistors [IGFETs] characterised by the gate dielectrics the gate dielectric comprising a multilayered structure comprising at least one organic layer and at least one inorganic layer
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/16—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
- H10K71/164—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering using vacuum deposition
Definitions
- the present invention relates to a method for manufacturing a thin film semiconductor device and a thin film semiconductor device, and more particularly to a method for manufacturing a thin film semiconductor device suitable for bottom-gate fabrication using an organic semiconductor layer, and a thin film semiconductor device obtained thereby.
- Thin film transistors are widely used as drive elements in thin electronic substrates, particularly active matrix thin display devices.
- semiconductor devices using organic semiconductors as active layers have attracted attention.
- a semiconductor device using an organic semiconductor can be formed by coating an active layer made of an organic semiconductor at a low temperature, which is advantageous for cost reduction and a flexible substrate having no heat resistance such as plastic. It can also be formed on top.
- the gate insulating film, source / drain electrodes, and even the gate electrode can be patterned by printing methods using coating materials, further reducing costs. It is done.
- a bottom gate / bottom contact type thin film transistor 10 0 1 is formed on a substrate 1 0 3 with a gate electrode 1 0 5, a gate insulating film 1 0 7, a source / drain electrode 1 0 9, and a thin film
- the semiconductor layers 1 1 1 are stacked in this order.
- a resist pattern is formed by applying a photolithographic method capable of forming a fine pattern, and the gate electrode 10 5 source / drain electrode 10 is formed by pattern etching using the resist pattern as a mask.
- Non-Patent Document 1 K Nomoto et. Al., “IEEE Transactions on Electron Devices, (2 0 0 5), vol. 5 2, p. 1 5 1 9—p. 1 5 2 6.
- FIG. As shown, the bottom-gate / bottom-contact type thin film transistor has a structure in which the source / drain electrodes 10 9 are provided on the gate insulating film 10 7. The influence of this is exerted on the surface of the gate insulating film 10 07.
- the gate insulating film 10 07 is made of an organic material
- pattern formation of the source / drain electrodes 10 09 is performed.
- the gate insulating film 10 7 is exposed to the organic solvent for removing the resist pattern used in the step 1, and it becomes difficult to maintain the film quality of the surface layer that becomes the interface with the thin film semiconductor layer 1 1 1. Degradation of the interface between the gate insulating film 1 0 7 and thin film semiconductor layer 1 1 1 And it becomes a factor that causes problems mobility reduction, and the like. Disclosure of the Invention
- An object of the present invention is to provide a method for manufacturing a thin film semiconductor device having a bottom gate / bottom contact type thin film transistor structure and a thin film semiconductor device obtained by the manufacturing method. .
- a method of manufacturing a thin film semiconductor device includes forming a first gate insulating film in a state of covering a gate electrode formed on a base, and After forming a pair of source / drain electrodes on the film, a second gate insulating film is formed only on the first gate insulating film exposed from the source / drain electrodes. Next In contact with the source / drain electrode, the second
- the second gate insulating film formed after the source / drain electrodes is not affected by the formation of the source / drain electrodes, and the film quality of the second gate insulating film is not affected. Maintained. Then, since the thin film semiconductor layer is formed on the source / drain electrodes and the second gate insulating film, the interface between the second gate insulating film and the thin film semiconductor layer maintaining the film quality is the channel interface. It becomes. Also, the source / drain electrode formation is not affected by the thin film semiconductor layer. Therefore, on the gate insulating film covering the gate electrode, it is possible to obtain a channel portion interface and a thin film semiconductor layer that are kept in a good state without being affected by the formation of the source / drain electrodes.
- the present invention is also a thin film semiconductor device obtained by the method described above, and has the following configuration. That is, a thin film semiconductor device includes a gate insulating film covering a gate electrode on a substrate, a source / drain electrode provided on the gate insulating film, and a gate insulating film extending from the source / drain electrode to the gate insulating film. And a thin film semiconductor layer continuously covering.
- the gate insulating film has a laminated structure of a first gate insulating film and an upper second gate insulating film. The first gate insulating film covers the gate electrode and is provided with source / drain electrodes on the top.
- the second gate insulating film is a film selectively formed only on the first gate insulating film exposed from the source Z drain electrode at least between the source Z drain electrodes.
- a channel interface and a thin film semiconductor layer that are kept in a good state without being affected by the formation of the source drain electrode on the gate insulating film covering the gate electrode can be obtained. Can do. Therefore, even when an organic material is used for the gate insulating film and the thin film semiconductor layer using an organic material, for example, the resist pattern after forming a fine source / drain electrode by applying the lithography technique is used.
- the channel interface and the state of the thin film semiconductor layer are not affected by the removal of ions. It is possible to obtain a thin film semiconductor device having a bottom gate / bottom contact type thin film drainage structure that can be maintained well and that is finer but has good characteristics.
- FIG. 1 is a cross-sectional process diagram illustrating an embodiment of the manufacturing method of the present invention.
- FIG. 2 is a diagram showing a configuration of an embodiment of the thin film semiconductor device of the present invention.
- FIG. 3 is a graph showing changes with time in the amount of change in threshold shift in the thin film transistors of the example and the comparative example 1.
- FIG. 4 is a cross-sectional view showing a configuration of a conventional thin film transistor.
- a substrate 3 is prepared.
- a plastic substrate such as polyethylene terephthalate (PET), polyethersulfone (PES) or polyethylene naphtharate (PEN), a glass substrate, or a stainless steel substrate is used.
- a gate electrode 5 is formed on such a substrate 3.
- the gate electrode 5 is formed by, for example, forming a metal film and pattern etching of the metal film using a resist pattern formed by a photolithography technique as a mask.
- the metal film may be formed by applying a film formation method suitable for the material.
- Sputter deposition can be applied to metal films such as Al, Cu, Au, Ni, W, and Mo. Further, if the metal film is made of Au, Ag Ni, Pd, Cr or the like, a metal film deposition or a vapor deposition film can be applied. In addition, after the metal film is pattern-etched using the resist pattern as a mask, the resist pattern is removed. Do the last. By applying the lithography technique as described above, a finer gate electrode 5 is formed.
- the gate electrode 5. can be formed by applying a printing method such as a nanoparticle dispersion such as Au or Ag, a metal complex solution, or an inkjet method using a conductive molecule solution, a microcontact method, or a screen printing method. You can do it. '
- a first gate insulating film 7-1 is formed so as to cover the gate electrode 5 on the substrate 3.
- the first gate insulating film 7-1 is formed by applying an organic insulating film solution obtained by dissolving an organic insulating film material in an organic solvent by a method such as a spin code or a slit coat.
- an organic insulating film solution obtained by dissolving an organic insulating film material in an organic solvent by a method such as a spin code or a slit coat.
- NMP N-methylbidonidone
- PVP polyvinylphenol
- PEGMEA polyethylene glycol methyl ether acrylate
- poly (hy-methylstyrene) poly (hy-methylstyrene). It can be used with an organic insulating film solution.
- the “first” gate insulating film 7-1 made of an organic material is formed.
- the first gate insulating film 7-1 formed as described above has high adhesion to the source / drain electrode (9) and has a stable surface, such as polyimide, PVP, or poly (s). It is preferably composed of an organic material such as (methylstyrene).
- a pair of source / drain electrodes 9 is formed at a position sandwiching the gate electrode 5 on the first gate insulating film 7-1.
- the source / drain electrode 9 may be formed in the same manner as the gate electrode 5 is formed. In this case, if the lithography technique is applied, finer source / drain electrodes are formed : the same as the gate electrode formation.
- the step of selectively forming the second gate insulating film 7-2 only on the first gate insulating film 7-1 exposed from the source / drain electrode 9 is performed.
- the second gate insulating film 7-2 is selectively formed only on the first gate insulating film 7-1 by vapor phase growth.
- the second gate insulating film 7-2 as described above is used for the source Z drain electrode with respect to the incubation time (including 0) of the gas phase growth on the first gate insulating film 7-1.
- 9 is formed using a film-forming material that can be grown so that the incubation time for vapor deposition on the substrate 9 is sufficiently long. Then, during the incubation time of vapor deposition of the second gate insulating film 7 -2 on the source / drain electrode 9, the second gate insulating film 7-2 is aired only on the first gate insulating film 7-1. By phase growth, the second gate insulating film 7-2 is selectively formed.
- the incubation time is a period during which the film thickness is kept at 0 from the start of film formation.
- the source / drain electrode 9 is made of a metal material and the first gate insulating film 7-1 is made of an organic material
- polyparachloroxylylene (2) is used as the second gate insulating film 7-2.
- the second gate insulating film 6-2 is selectively formed on the first gate insulating film 7-1.
- parylene-C and parylene-N are deposited on Au, Cu, Ni, Pt, and Ag while they are deposited on a substrate with no film incubation time at a thickness of 1 Onm.
- Literature Kathleen M. Vaeth and Klavs R Jensen, Chem. Mater., 12, 1305-1313 (2000). Therefore, selective film formation on the first gate insulating film 7-1 made of an organic material with the source / drain electrode 9 using Au, Cu, Ni, P "t, or Ag exposed. Is easy.
- the second gate insulating film 7-2 to be selectively formed by vapor deposition on the first gate insulating film 7-1 made of an organic material can be a fluorine group or Polyparaxylylene derivatives having an amino group (alkylene-phenylene resin) can also be used.
- the selective vapor deposition of the second gate insulating film 7 -2 on the first gate insulating film 7-1 made of organic material is the so-called chemical vapor deposition (CVD) method. good.
- CVD chemical vapor deposition
- Such film formation is performed, for example, by a source gas containing parylene-C or parylene-N pyrolyzed at 600 ° C ⁇ 150 ° C in a reaction chamber containing the substrate 3 and decompressed to 0 IPa or less. To supply. At this time, the substrate is heated and cooled as necessary, but the film can be formed even at room temperature.
- the thickness of the second gate insulating film 7-2 that is selectively formed only on the first gate insulating film 7-1 as described above is such that the second gate insulating film 7- It is preferable to form the film within a range of the film thickness formed on the first gate insulating film 7-1 before the continuous growth of 2 is started.
- the film thickness depends on the material of the source / drain electrode 9 and the combination of the first gate insulating film 7-1 and the second gate insulating film 7-2, but is typically l nm or more and 100 nm or less. Range.
- a thin film semiconductor layer 11 is formed on the source / drain electrode 9 and the second gate insulating film 7-2.
- the thin film semiconductor layer 1 1 is formed so as to continuously cover the pair of source / drain electrodes 9 and the first gate insulating film 7-1 through the second gate insulating film 7-2.
- the thin film semiconductor layer 11 is an organic semiconductor film using an organic material, for example.
- Such a thin-film semiconductor layer 11 is made of an organic semiconductor (acene, acene derivative, polyphyllin, porphyrin derivative, oligothiophene, thiophene polymer, etc.) material, such as vapor deposition or spin coating and ink jet printing. It is formed by a coating method.
- organic semiconductor acene, acene derivative, polyphyllin, porphyrin derivative, oligothiophene, thiophene polymer, etc.
- a bottom gate / bottom contact type thin film transistor is formed as the thin film semiconductor device 1 as shown in FIG.
- the plan view in Fig. 2. (a) is equivalent to the A–A 'cross section in the plan view in Fig. 2 (b).
- the interlayer insulating film forms a wiring according to the use to integrate the thin film semiconductor device and the multilayer wiring, and further form a sealing film.
- the sealing film is formed with an alkylene-phenylene-based resin such as polyparachloroxylylene (parylene-C) with a film thickness of several m / m by the CVD method.
- the sealing film is not limited to an alkylene-phenylene resin, but may be any glass sealing material or epoxy resin, silicon nitride (SiNx), or the like that has a sealing effect. '
- the thin film semiconductor device 1 thus obtained includes a gate insulating film 7 covering the gate electrode 5 on the substrate 3, a pair of source / drain electrodes 9 provided on the gate insulating film 7, and a source / drain electrode 9 Cover continuously from the top to the gate insulating film 7 A bottom gate / bottom contact type having a thin film semiconductor layer 11.
- the gate insulating film 7 has a laminated structure of a first gate insulating film 7-1 and a second gate insulating film 7 -2.
- the first gate insulating film 7 -1 covers the gate electrode 5 and is provided with the source / drain electrode 9 on the top.
- the second gate insulating film 7 -2 is a film selectively formed only on the first gate insulating film 7-1 exposed from the source / drain electrode 9 between the source / drain electrodes 9.
- the source / drain electrode 9 is formed with the source / drain electrode 9 formed on the first gate insulating film 7-1.
- the second gate insulating film 7 -2 is selectively formed on the first gate insulating film 7 -1 exposed from the substrate. Therefore, the second gate insulating film 7 -2 is not affected by the formation of the source / drain electrode 9 and the film quality of the second gate insulating film 7 -2 is maintained.
- the formation of the source / drain electrode 9 is not affected. For this reason, the interface between the second gate insulating film 7 -2 and the thin film semiconductor layer 11, whose film quality is maintained, becomes the channel interface S.
- the channel portion interface S and the thin film semiconductor layer 11 which are kept in a good state without being affected by the formation of the source / drain electrode 9.
- a gate insulating film made of an organic material is used as an organic solvent for the subsequent removal of the resist pattern.
- the 7 surface (that is, the 2nd gate insulating film 7 -2 surface) and the thin film semiconductor layer 1 1 are not exposed.
- the first gate insulating film 7 -1 formed in the first embodiment is replaced with an inorganic insulating film such as silicon oxide (S i Ox) or silicon nitride (S i N x),
- an inorganic insulating film such as silicon oxide (S i Ox) or silicon nitride (S i N x)
- the inorganic insulating film silicon oxide (S i Ox), silicon nitride (S iNx), etc., which have high reliability particularly against gate leakage and current stress, are preferably used. Such an inorganic insulating film is spattered. The film is formed by laser enhanced CVD (PE CVD: chemical vapor deposition).
- PE CVD laser enhanced CVD
- the organic insulating film the organic material constituting the first gate insulating film 7-1 described in the first embodiment is used.
- the adhesion with the source / drain electrode 9 is high and the surface state is stable. It is also the same that preferred polyimide, PVP, or poly ( ⁇ -methylstyrene) is preferably used.
- the steps after the formation of the first gate insulating film 7-1 may be performed in the same manner as described in the first embodiment.
- the first gate insulating film 7-1 includes silicon oxide (S i Ox), silicon nitride (S iNx), and the like.
- the third embodiment is a method in which the selective film formation of the second gate insulating film 7-2 described with reference to FIG. 1 (4) in the first embodiment is performed by coating film formation.
- the manufacturing method of the third embodiment will be described with reference to FIG.
- the steps shown in FIGS. 1 (1) and 1 (2) are performed in the same manner as described in the first embodiment, and the gate electrode 5 is formed on the substrate 3 and this is formed into a first gate insulating material made of an organic material. Cover with membrane 7-1.
- the organic material constituting the first gate insulating film 7-1 in particular, polyimide, PVP, or poly (polymethylstyrene) that has high adhesion to the source Z drain electrode 9 and has a stable surface state is preferably used. The same can be said.
- the source / drain electrode 9 is formed using a material having liquid repellency with respect to the material solution of the second gate insulating film (7-2) formed in the next step. .
- the metal chain for example, Ag nanoparticle
- the alkyl chain that is the material solution of the second gate insulating film (7-2) is fluorine.
- a mixed solution in which molecules that repel organic solvents having a substituted alkyl chain and the like are mixed is used.
- a thiol compound silane coupling agent
- the pattern of the source / drain electrode 9 is formed by applying a printing method such as an ink jet method, a microcontact method, or a screen printing method using such a mixed solution.
- the mixed liquid may further be mixed with a polymer material containing an alkanethiol or perfluoro group.
- the source / drain electrode 9 is formed by coating the mixed solution on the first gate insulating film 7-1, and pattern-etching the coated film using a resist pattern formed by a photolithography technique as a mask. It may be a method. By applying such a lithography technique, a finer source / drain electrode 9 is formed.
- the organic insulating film solvent a solvent containing a molecular material having an alkyl chain or a perfluoro group is used.
- Alkyl chain N-fluoro group has low surface energy
- the organic insulating film solvent is repelled on the source / drain electrode 9, and the film can be formed only on the first gate insulating film 7-1 made of an organic material.
- an organic insulating film such as a fluororesin obtained by cyclopolymerizing polyimide, polyvinylphenol (PVP), poly (hyrmethylstyrene), or perfluoro (4-vinyloxy-1-butene) is obtained.
- polyimides with good adhesion to the next thin film semiconductor layer (11), such as PVP, poly (-methylstyrene), and perfluoro (4-vinyloxy-1-butene) are cyclopolymerized. It is preferable to form the second gate insulating film 7-2 made of the prepared fluororesin.
- the second gate insulating film 7-2 formed here is also preferably formed in the range of 1 nm or more and 10 Onm or less as in the first embodiment, for example, a thin film of 50 nm or less. It is formed. Since the typical thickness of the first gate insulating film in an organic transistor is 300-1000 nm, if the second gate insulating film 7-2 is within the above range, the gate insulating film Even if the gate capacitance is reduced by increasing the film thickness of the transistor, the driving capability of the transistor is reduced due to the effect of improving the mobility by modifying the gate insulating film / organic semiconductor interface by forming the second gate insulating film 7-2. Does not have a big impact. After the above, the process shown in FIG.
- Insulating film 7-1 A thin film semiconductor layer 11 made of an organic material is formed so as to cover the insulating film 7-1 continuously.
- the thin film semiconductor device 1 includes a first gate insulating film 7-1 that covers a gate electrode 5 and is provided with a source / drain electrode 9 on the upper side, and a source / drain between the source / drain electrode 9.
- a gate insulating film 7 composed of a second gate film 7-2 selectively formed only on the first gate insulating film 7-1 exposed from the electrode 9 is provided.
- the source / drain is formed with the source / drain electrode 9 formed on the first gate insulating film 7-1.
- the second gate insulating film 7 -2 is selectively formed on the first gate insulating film 7-1 exposed from the fin electrode 9. For this reason, the same effect as that of the first embodiment can be obtained, and it is possible to obtain a thin film semiconductor device having a bottom gate / bottom contact type thin film transistor structure that is finer but has good characteristics.
- the second gate insulating film 7-1 constituting the surface of the gate insulating film 7 can be formed by using a fluoropolymer obtained by cyclopolymerizing the above, an improvement in device characteristics can be expected.
- the fourth embodiment is an example in which the first gate insulating film 7-1 formed in the third embodiment is changed to an inorganic insulating film, and the other configuration is the same as that of the second embodiment.
- the inorganic insulating film silicon oxide (S iOx), silicon nitride (S iNx), etc., which are particularly reliable against gate leakage and current stress, are preferably used.
- Such an inorganic insulating film is formed by plasma enhanced CVD (chemical vapor deposition).
- the steps after the formation of the first gate insulating film 7-1 may be performed in the same manner as described in the third embodiment.
- the first gate insulating film 7-1 is not limited to silicon oxide (S iOx) or silicon nitride (S iNx).
- SiOx silicon oxide
- SiNx silicon nitride
- the first gate insulating film 7-1 formed in the third embodiment is replaced with an inorganic insulating film such as silicon oxide (S iOx) or silicon nitride (S iNx), and an organic insulating film on the upper side.
- the other structure is the same as that of the third embodiment. It is the same.
- the organic insulating film constituting the surface layer of the first gate insulating film 7 -1 may be the same as the first gate insulating film 7 -1 of the third embodiment, but in particular, with the source / drain electrode 9
- Polyimide, PVP, or poly (-methylstyrene) having high adhesion and a stable surface state is preferably used. If necessary, an organic insulating film may be sandwiched between inorganic insulating films constituting the lower layer of the first gate insulating film 7-1.
- the steps after the formation of the first gate insulating film 7 -1 may be performed in the same manner as described in the third embodiment.
- the first gate insulating film 7 -1 of the third embodiment has a gate leakage current stress such as silicon oxide (S i Ox) or silicon nitride (S i N x).
- a gate leakage current stress such as silicon oxide (S i Ox) or silicon nitride (S i N x).
- the surface layer of the first gate insulating film -1 -1 is made of polyimide, PVP, poly ( ⁇ -methylstyrene) or the like having high adhesion to the source / drain electrode 9 and having a stable surface state. Therefore, the effect of preventing the source / drain electrode 9 from peeling off can be obtained.
- a thin film semiconductor device was fabricated as follows by applying the first embodiment (see FIG. 1).
- the purpose of this example is to confirm the effect of forming the second gate insulating film, so that the gate electrode that does not affect this effect is a single crystal that has been doped with impurities at a high concentration to reduce resistance.
- a substrate 3 made of silicon was prepared, and this was also used as the gate electrode 5.
- PVP polyvinyl phenol
- a second gate insulating film 7-2 made of parylene-C was selectively formed on the first gate insulating film 7-1 exposed from the source / drain electrode 9 by CVD.
- an organic thin film semiconductor layer 11 made of pentacene was formed to a thickness of 100 nm by vapor deposition. At this time, the thin film semiconductor layer 11 was patterned so as to have a channel width of 50 mm.
- the bottom gate (1) bottom contact type thin film semiconductor device 1 of the example was obtained.
- Table 1 below shows the carrier mobility and the amount of change in the threshold shift after applying stress measured for the thin film semiconductor device 1 fabricated in the above example and comparative example 1 (- ⁇ Vth: initial value immediately after voltage application) Change amount as a threshold value).
- Comparative Example 2 As Comparative Example 2, a thin film transistor (so-called ⁇ : —Si TFT) having the same channel length as that of the example 5 m and channel width 50 mm and using amorphous silicon (a-Si) as an active layer was fabricated.
- ⁇ —Si TFT
- FIG. 3 shows the change over time of the threshold shift even in the stress applied state, as measured for the thin film semiconductor device 1 fabricated in the above Example and Comparative Example 2.
- the embodiment in which the second gate insulating film 7 -2 is formed by applying the present invention has much smaller threshold shift and higher reliability than the a-Si TFT of the same specification. confirmed.
- the amount of change in the threshold shift after 1000 seconds [sec] was ⁇ 0.14 V for the thin film transistor of this example, while ⁇ 1.8 V for the Si TFT.
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP08710726A EP2110856A4 (en) | 2007-01-29 | 2008-01-28 | METHOD FOR MANUFACTURING THIN FILM SEMICONDUCTOR DEVICE AND THIN FILM SEMICONDUCTOR DEVICE |
US12/523,943 US20100078639A1 (en) | 2007-01-29 | 2008-01-28 | Thin film semiconductor device fabrication method and thin film semiconductor device |
CN2008800033898A CN101595568B (zh) | 2007-01-29 | 2008-01-28 | 薄膜半导体装置的制作方法及薄膜半导体装置 |
KR1020097015735A KR20090113274A (ko) | 2007-01-29 | 2008-01-28 | 박막 반도체 장치의 제조 방법 및 박막 반도체 장치 |
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JP2007017454A JP2008186885A (ja) | 2007-01-29 | 2007-01-29 | 薄膜半導体装置の製造方法および薄膜半導体装置 |
JP2007-017454 | 2007-01-29 |
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US (1) | US20100078639A1 (ja) |
EP (1) | EP2110856A4 (ja) |
JP (1) | JP2008186885A (ja) |
KR (1) | KR20090113274A (ja) |
CN (1) | CN101595568B (ja) |
TW (1) | TW200903656A (ja) |
WO (1) | WO2008093854A1 (ja) |
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JP2010219530A (ja) * | 2009-03-13 | 2010-09-30 | National Tsing Hua Univ | 有機薄膜トランジスタ、その作製方法、および、それに使用されるゲート絶縁層 |
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JP2009117619A (ja) * | 2007-11-06 | 2009-05-28 | Idemitsu Kosan Co Ltd | 有機薄膜トランジスタの製造方法及び有機薄膜トランジスタ |
JP2010093093A (ja) | 2008-10-09 | 2010-04-22 | Hitachi Ltd | 半導体装置およびその製造方法 |
TWI469224B (zh) * | 2008-10-20 | 2015-01-11 | Ind Tech Res Inst | 有機薄膜電晶體及其製造方法 |
JP2010171165A (ja) * | 2009-01-22 | 2010-08-05 | Sony Corp | 有機半導体装置およびその製造方法 |
JP5560629B2 (ja) * | 2009-09-04 | 2014-07-30 | コニカミノルタ株式会社 | 薄膜トランジスタの製造方法 |
US8211782B2 (en) * | 2009-10-23 | 2012-07-03 | Palo Alto Research Center Incorporated | Printed material constrained by well structures |
GB201114215D0 (en) * | 2011-08-18 | 2011-10-05 | Cambridge Display Tech Ltd | Electronic device |
CN112466931A (zh) | 2020-11-27 | 2021-03-09 | Tcl华星光电技术有限公司 | 电极结构及其制备方法、薄膜晶体管 |
CN112892927A (zh) * | 2021-01-20 | 2021-06-04 | 程建国 | 一种半导体表面绝缘薄膜加工装置 |
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JP2008186885A (ja) | 2008-08-14 |
CN101595568B (zh) | 2011-07-13 |
TW200903656A (en) | 2009-01-16 |
CN101595568A (zh) | 2009-12-02 |
EP2110856A1 (en) | 2009-10-21 |
EP2110856A4 (en) | 2012-06-27 |
KR20090113274A (ko) | 2009-10-29 |
US20100078639A1 (en) | 2010-04-01 |
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