CN204102902U - Linear pitch distribution fixed charge island SOI pressure-resistance structure and power device - Google Patents
Linear pitch distribution fixed charge island SOI pressure-resistance structure and power device Download PDFInfo
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- CN204102902U CN204102902U CN201420611626.1U CN201420611626U CN204102902U CN 204102902 U CN204102902 U CN 204102902U CN 201420611626 U CN201420611626 U CN 201420611626U CN 204102902 U CN204102902 U CN 204102902U
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Abstract
The utility model discloses a kind of linear pitch distribution fixed charge island SOI pressure-resistance structure and power device, comprises the substrate layer, dielectric buried layer, active layer and the multiple concentration that stack successively from bottom to top and is more than or equal to 1 × 10
13cm
-2high concentration fixed charge district; These high concentration fixed charge districts are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts are all positioned at dielectric buried layer top, and arrange in being interrupted each other; On horizontal withstand voltage direction, the spacing between every 2 high concentration fixed charge districts is linearly successively decreased or increases progressively.The utility model not only can improve dielectric buried layer electric field greatly, thus effectively improves withstand voltage; And technique realizes simple, completely compatible with stand CMOS.
Description
Technical field
The utility model belongs to field of semiconductor, is specifically related to a kind of linear pitch distribution fixed charge island SOI pressure-resistance structure and power device.
Background technology
SOI (Silicon On Insulator, silicon in dielectric substrate) power device has high operating rate and integrated level, reliably insulation property, strong Radiation hardness and without controllable silicon self-locking effect, is widely used in the fields such as power electronics, industrial automation, Aero-Space and weaponry.
The puncture voltage of SOI power device is carried out ionization integral and calculating by electric field along withstand voltage length and is obtained, depend on longitudinally withstand voltage and horizontal withstand voltage in smaller.SOI laterally withstand voltage design principle can continue to use ripe silica-based principle and technology, such as RESURF (Reduce SURface electric Field reduces surface field), variety lateral doping, field plate and super-junction structure etc.And prevent the depletion region of device to expand to substrate due to dielectric buried layer, can only be born by top layer silicon and dielectric buried layer so SOI is longitudinally withstand voltage.But by the restriction of device architecture, self-heating effect and technique, top layer silicon and dielectric buried layer all can not be too thick, so cause longitudinally withstand voltage lower, become the main cause of the horizontal SOI power device of restriction and integrated circuit development and application.
Typical conventional n-type SOI LDMOS (Lateral Double Diffused Metal Oxide Semiconductor, lateral double diffusion metal oxide semiconductor) structure of device, as shown in Figure 1, it is primarily of source electrode, n+ source region, gate oxide, N-shaped active semiconductor layer, n+ drain region, drain electrode, p-type channel region, p-type substrate semiconductor layer and dielectric buried layer composition.Be SiO for dielectric buried layer
2conventional SOI device, by the restriction of Gauss theorem, dielectric buried layer electric field E during device breakdown
iwith semiconductor active layer electric field E
s" E need be met
i=3E
s".Under regular situation, the critical breakdown electric field of silicon is 20-40V/um, so during device breakdown, and E
ibe only about 100V/um, do not reach SiO far away
2more than critical breakdown electric field 600V/um, so SiO
2withstand voltage potentiality fail to be fully used.
In order to the longitudinal direction improving SOI device is withstand voltage, notification number is that the Chinese utility model patent of CN101477999A discloses one " for power device have interface charge island SOI pressure-resistance structure ", it is primarily of semiconductor substrate layer, dielectric buried layer and semiconductor active layer.The multiple high concentration n+ districts stretched in described semiconductor active layer are provided with in the four corner or part range of the interface of described dielectric buried layer and semiconductor active layer, multiple high concentration n+ interval is disconnected to be arranged, described high concentration n+ district is semiconductor material, multiple high concentration n+ district forms interface charge island, and the concentration range in high concentration n+ district is greater than 1 × 10
16cm
-3.This utility model, in the active layer of conventional SOI power device, is provided with at least one interface island buried regions on dielectric buried layer, the conduction type of active layer is contrary with the conduction type of interface island buried regions.When applying reversed bias voltage when draining, simultaneously source, grid and Substrate ground time, the upper interface of dielectric buried layer is by adaptively collecting hole, and hole concentration increases from source to thread cast-off.Although these interface cavity energies effectively increase dielectric buried layer electric field and improve withstand voltage, charge-islands is formed in silicon active layer, and during high temperature, horizontal and vertical expansion is serious, and this charge-islands is also difficult to realize in thin silicone layer.
Utility model content
Technical problem to be solved in the utility model is the resistance to voltage device of the conventional SOI longitudinally resistance to deficiency forced down, a kind of linear pitch distribution fixed charge island SOI pressure-resistance structure and power device are provided, it not only can improve dielectric buried layer electric field greatly, thus effectively improves withstand voltage; And technique realizes simple, completely compatible with stand CMOS.
For solving the problem, the utility model is achieved through the following technical solutions:
A kind of linear pitch distribution fixed charge island SOI pressure-resistance structure, comprise the substrate layer, dielectric buried layer and the active layer that stack successively from bottom to top, its difference is: also comprise multiple concentration further and be more than or equal to 1 × 10
13cm
-2high concentration fixed charge district; These high concentration fixed charge districts are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts are all positioned at dielectric buried layer top, and arrange in being interrupted each other; On horizontal withstand voltage direction, the spacing between every 2 high concentration fixed charge districts is linearly successively decreased or increases progressively.
In such scheme, the concentration in all high concentration fixed charge districts is preferably all equal.
In such scheme, described high concentration fixed charge district is injected in dielectric buried layer by ion implantation mode, and the ion injected is preferably caesium cation, sodium cation, iodine cation, boron cation and/or siliconium ion.
In such scheme, the height in all high concentration fixed charge districts is preferably all equal.
In such scheme, the top in all high concentration fixed charge districts is preferably equal to the distance of dielectric buried layer upper surface.
In such scheme, described dielectric buried layer preferably has the heat radiation silicon window of up/down perforation substrate layer and active layer.
Have the SOI power device of above-mentioned linear pitch distribution fixed charge island SOI pressure-resistance structure, i.e. SOILDMOS (lateral double diffusion metal oxide semiconductor) device, comprises the substrate layer, dielectric buried layer and the active layer that stack successively from bottom to top; On both sides in described active layer, edge is provided with source region, channel region and drain region; Source region and channel region are affixed, and edge on the side being simultaneously arranged on active layer; Edge on the opposite side that drain region is then arranged on active layer; The surface of active layer is provided with source electrode, grid and drain electrode; Source electrode is overlying on the top in source region, and grid is overlying on the top of source region and channel region simultaneously; Drain electrode is overlying on the top in drain region; Its difference is, also comprises multiple concentration further and is more than or equal to 1 × 10
13cm
-2high concentration fixed charge district; These high concentration fixed charge districts are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts are all positioned at dielectric buried layer top, and arrange in being interrupted each other; On the direction that laterally withstand voltage direction and source electrode extremely drain, the spacing between every 2 high concentration fixed charge districts is linearly successively decreased or increases progressively.
Have the SOI power device of above-mentioned linear pitch distribution fixed charge island SOI pressure-resistance structure, i.e. SOIIGBT (insulated gate bipolar transistor) device, comprises the substrate layer, dielectric buried layer and the active layer that stack successively from bottom to top; On both sides in described active layer, edge is provided with negative electrode charged region, channel region and anode charged region; Negative electrode charged region and channel region are affixed, and edge on the side being simultaneously arranged on active layer; Edge on the opposite side that anode charged region is then arranged on active layer; The surface of active layer is provided with negative electrode, grid and anode; Negative electrode is overlying on the top of negative electrode charged region, and grid is overlying on the top of negative electrode charged region and channel region simultaneously; Anode is overlying on the top of anode charged region; Its difference is, also comprises multiple concentration further and is more than or equal to 1 × 10
13cm
-2high concentration fixed charge district; These high concentration fixed charge districts are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts are all positioned at dielectric buried layer top, and arrange in being interrupted each other; Laterally withstand voltage direction and anode are on the direction of negative electrode, the spacing between every 2 high concentration fixed charge districts is linearly successively decreased or increases progressively.
Have the SOI power device of above-mentioned linear pitch distribution fixed charge island SOI pressure-resistance structure, i.e. power diode device, comprises the substrate layer, dielectric buried layer and the active layer that stack successively from bottom to top; On both sides in described active layer, corner place is provided with negative electrode charged region and anode charged region respectively; The surface of active layer is provided with negative electrode and anode; Negative electrode is overlying on the top of negative electrode charged region; Anode is overlying on the top of anode charged region; Its difference is, also comprises multiple concentration further and is more than or equal to 1 × 10
13cm
-2high concentration fixed charge district; These high concentration fixed charge districts are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts are all positioned at dielectric buried layer top, and arrange in being interrupted each other; Laterally withstand voltage direction and anode are on the direction of negative electrode, the spacing between every 2 high concentration fixed charge districts is linearly successively decreased or increases progressively.
Compared with prior art, the utility model has following features:
1, high concentration fixed charge district acts on the shape high concentration electric subarea, interface of dielectric buried layer directly over it and semiconductor active layer by Coulomb force, the hole of high concentration can be accumulated again between two adjacent electronic area, substantially increase the interface charge of burying dielectric layer surface.According to Gauss theorem, this interface charge meeting amplified medium buried regions electric field strength, thus effectively improve longitudinally withstand voltage;
2, the material in high concentration fixed charge district is medium, the mode of ion implantation can be directly adopted to realize, and the cation injected is very little at dielectric buried layer diffusion coefficient, be approximately fixed charge, must affect by subsequent high temperature processes hardly, simultaneously completely compatible with conventional cmos/SOI technology, technique realizes simple; In addition, the material due to high concentration fixed charge district is medium, compared with the structure of existing change dielectric buried layer shape, can not adopt too much insulating material, and also just not additional self-heating effect produces;
3, the fixed charge district concentration range of high concentration is equal to or greater than 1 × 10
13cm
-2, when being equal to or greater than this value, doping content does not almost affect puncture voltage, and process allowance is better;
4, the spacing in multiple high concentration fixed charge district linearly distributes, and improves drift doping concentration further, reduces conducting resistance.
5, on dielectric buried layer, have the silicon window of heat radiation, thus form PSOI structure, while raising is withstand voltage, self-heating effect can be alleviated further;
6, will linear pitch distribution fixed charge island SOI pressure-resistance structure be had be applicable to the SOI lateral power of all main flows, it is withstand voltage due to the remarkable enhancing of dielectric buried layer electric field comparatively conventional structure SOI device greatly improve.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing conventional n-type SOI LDMOS device.
Fig. 2 is a kind of linear pitch distribution of the utility model fixed charge island SOI pressure-resistance structure schematic diagram.
Fig. 3 is the utility model another kind of linear pitch distribution fixed charge island SOI pressure-resistance structure schematic diagram.
Fig. 4 is the structural representation of a kind of linear pitch distribution of the utility model fixed charge island SOI LDMOS device.
Fig. 5 a is the two-dimentional equipotential lines distribution map of the utility model linear pitch distribution fixed charge island SOI LDMOS device when reaching breakdown conditions.Fig. 5 b is the two-dimentional equipotential lines distribution map of conventional SOI LDMOS device when reaching breakdown conditions.
Fig. 6 is the utility model linear pitch distribution fixed charge island SOI LDMOS device and conventional SOILDMOS device longitudinal electric field distribution map when reaching breakdown conditions.
Fig. 7 is the structural representation of a kind of linear pitch distribution of the utility model fixed charge island SOI IGBT device.
Fig. 8 is the structural representation of a kind of linear pitch distribution of the utility model fixed charge island SOI power diode component.
Mark in figure: 1, source electrode, 2, source region, 3, grid, 4, active layer, 5, drain region, 6, drain, 7, channel region, 8, substrate layer, 9, dielectric buried layer, 10, high concentration fixed charge district, 11, negative electrode, 12, negative electrode charged region, 13, anode charged region, 14, anode, 15, heat radiation silicon window.
Embodiment
Embodiment 1:
A kind of linear pitch distribution fixed charge island SOI pressure-resistance structure, as shown in Figure 2, this pressure-resistance structure at least comprises substrate layer 8, dielectric buried layer 9 and active layer 4, and substrate layer 8, dielectric buried layer 9 and active layer 4 stack from bottom to top successively.Substrate layer 8, dielectric buried layer 9 are identical or close with the basic structure of the existing power device of prior art with the structure of active layer 4.The material of wherein said active layer 4 can be Si, SiC, GaAs, SiGe, GaN or other semi-conducting materials.The material of described dielectric buried layer 9 can be SiO
2or low-k materials, wherein low-k materials (low-k) can be carbon doped oxide or SiOF.But the material of the material of active layer 4 and dielectric buried layer 9 is not limited to above-mentioned cited material.Above-mentioned dielectric buried layer 9 can be a complete horizontal expansion structure, and completely by substrate layer 8 and active layer 4 longitudinally-spaced; Also can be as shown in Figure 3, dielectric buried layer 9 is offered the heat radiation silicon window 15 of up/down perforation substrate layer 8 and active layer 4, this heat radiation silicon window 15 for heat radiation, to alleviate self-heating effect further, now, certain media buried regions 9 is provided with between substrate layer 8 and active layer 4.In order to improve the withstand voltage of SOI device, the utility model is in described dielectric buried layer 9 in four corner or be provided with multiple high concentration fixed charge district 10 in part range.
On the top of dielectric buried layer 9, multiple high concentration fixed charge district 10 is arranged in being interrupted each other, its mode of being interrupted, and on horizontal withstand voltage direction, the spacing between every 2 high concentration fixed charge districts 10 is linearly successively decreased or increases progressively.In the utility model, only need the upper surface each high concentration fixed charge district 10 being injected into dielectric buried layer 9, its degree of depth injected can be identical or different.But in order to reduce mask plate quantity, reduce process costs, the top in all high concentration fixed charge districts 10 is preferably equal to the distance of dielectric buried layer 9 upper surface.
Described high concentration fixed charge district 10 is medium material, and charge polarity is just.In the utility model, described high concentration fixed charge district 10 is by ion implantation mode in dielectric buried layer 9, and its ion injected is the cations such as caesium, sodium, iodine, boron and silicon.The injection figure in each high concentration fixed charge district 10 is circle, rectangle, trapezoidal, triangle, square or hexagon.All high concentration fixed charge districts 10 can adopt same to inject figure, also can adopt different injection figures.In addition, the height in all high concentration fixed charge districts 10 and its shape are without direct relation, and it highly can be equal, also can be unequal.But in order to simplify production technology, in the utility model preferred embodiment, all high concentration fixed charge districts 10 all adopt same inject figure, and the height in each high concentration fixed charge district 10 and size all consistent.
The concentration in each high concentration fixed charge district 10 is more than or equal to 1 × 10
13cm
-2.The concentration in all high concentration fixed charge districts 10 can be equal, also can be unequal.Take into account process costs, in the utility model preferred embodiment, the concentration in all high concentration fixed charge districts 10 can be equal.Owing to being dielectric buried layer 9 between each high concentration fixed charge district 10, the formation hole, surface of the dielectric buried layer 9 of meeting between fixed charge district, thus amplified medium buried regions 9 electric field strength, effectively improve withstand voltage.
Embodiment 2:
Have a SOI power device for linear pitch distribution fixed charge island SOI pressure-resistance structure, i.e. SOILDMOS device, as shown in Figure 4, comprises the substrate layer 8, dielectric buried layer 9 and the active layer 4 that stack successively from bottom to top.On both sides in described active layer 4, edge is provided with source region 2, channel region 7 and drain region 5.Source region 2 and channel region 7 are affixed, and edge on the side being simultaneously arranged on active layer 4.Edge on the opposite side that 5, drain region is arranged on active layer 4.The surface of active layer 4 is provided with source electrode 1, grid 3 and drain electrode 6.Source electrode 1 is overlying on the top in source region 2, and grid 3 is overlying on the top of source region 2 and channel region 7 simultaneously.Drain electrode 6 is overlying on the top in drain region 5.Describedly bury in dielectric layer the multiple high concentration fixed charge districts 10 be also provided with further as described in example 1 above.Namely described SOI power device also comprises multiple concentration further and is more than or equal to 1 × 10
13cm
-2high concentration fixed charge district 10; These high concentration fixed charge districts 10 are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts 10 are all positioned at dielectric buried layer 9 top, and arrange in being interrupted each other; On the direction of laterally withstand voltage direction and source electrode 1 to drain electrode 6, the spacing between every 2 high concentration fixed charge districts 10 is linearly successively decreased or increases progressively.
When power device blocks resistance to pressure condition, act in Coulomb force, movable interface charge-the hole of high concentration can be produced directly between every two high concentration fixed charge districts 10, the electric field of active layer 4 silicon side is reduced, electric field simultaneously in remarkable amplified medium buried regions 9, longitudinal direction is withstand voltage to be born primarily of dielectric buried layer 9, thus significantly improves puncture voltage.
Under the parameter of identical structure, optimization: have the SOI LDMOS two dimension equipotential lines distribution of the high concentration fixed charge island SOI pressure-resistance structure of linear pitch distribution as Fig. 5 a, its reverse breakdown voltage is 490V; Conventional SOI LDMOS two dimension equipotential lines distribution is as Fig. 5 b, and its reverse breakdown voltage is 208V.Longitudinal electric field when having the reverse breakdown of the SOI LDMOS of the high concentration fixed charge island SOI pressure-resistance structure of linear pitch distribution and the SOILDMOS of routine is distributed as Fig. 6, and its electric field had in the SOI LDMOS dielectric buried layer 9 on the high concentration fixed charge island of linear pitch distribution is 4.7 × 10
6v/cm, the electric field in conventional SOI LDMOS dielectric buried layer 9 is 0.9 × 10
6v/cm.Compared with the SOILDMOS on the fixed charge island distributed with proportional spacing, the high concentration fixed charge island SOI LDMOS of linear pitch distribution is simultaneously when puncture voltage is identical, and conducting resistance declines 29%.
Embodiment 3:
Another kind has the SOI power device of linear pitch distribution fixed charge island SOI pressure-resistance structure, i.e. SOI IGBT device, as shown in Figure 7, comprises the substrate layer 8, dielectric buried layer 9 and the active layer 4 that stack successively from bottom to top.On both sides in described active layer 4, edge is provided with negative electrode charged region 12, channel region 7 and anode charged region 13.Negative electrode charged region 12 and channel region 7 are affixed, and edge on the side being simultaneously arranged on active layer 4.Edge on the opposite side that anode charged region 13 is arranged on active layer 4.The surface of active layer 4 is provided with negative electrode 11, grid 3 and anode 14.Negative electrode 11 is overlying on the top of negative electrode charged region 12, and grid 3 is overlying on the top of negative electrode charged region 12 and channel region 7 simultaneously.Anode 14 is overlying on the top of anode charged region 13.Describedly bury in dielectric layer the multiple high concentration fixed charge districts 10 be also provided with further as described in example 1 above.Namely described SOI power device comprises multiple concentration further and is more than or equal to 1 × 10
13cm
-2high concentration fixed charge district 10; These high concentration fixed charge districts 10 are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts 10 are all positioned at dielectric buried layer 9 top, and arrange in being interrupted each other; On the direction of laterally withstand voltage direction and anode 14 to negative electrode 11, the spacing between every 2 high concentration fixed charge districts 10 is linearly successively decreased or increases progressively.
Embodiment 4:
Another has the SOI power device of linear pitch distribution fixed charge island SOI pressure-resistance structure, i.e. SOI power diode component, as shown in Figure 8, comprises the substrate layer 8, dielectric buried layer 9 and the active layer 4 that stack successively from bottom to top.On both sides in described active layer 4, corner place is provided with negative electrode charged region 12 and anode charged region 13 respectively.The surface of active layer 4 is provided with negative electrode 11 and anode 14.Negative electrode 11 is overlying on the top of negative electrode charged region 12.Anode 14 is overlying on the top of anode charged region 13.Describedly bury in dielectric layer the multiple high concentration fixed charge districts 10 be also provided with further as described in example 1 above.Extremely described SOI power device also comprises multiple concentration further and is more than or equal to 1 × 10
13cm
-2high concentration fixed charge district 10; These high concentration fixed charge districts 10 are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts 10 are all positioned at dielectric buried layer 9 top, and arrange in being interrupted each other; On the direction of laterally withstand voltage direction and anode 14 to negative electrode 11, the spacing between every 2 high concentration fixed charge districts 10 is linearly successively decreased or increases progressively.
The utility model is not limited only to above-described embodiment, as not only can the high concentration fixed charge island SOI pressure-resistance structure that designed linear pitch distributes being applied in diode and power MOS (Metal Oxide Semiconductor) device, can be used in power integrated circuit, as long as have in addition can the crystal structure of the substrate layer 8 of this pressure-resistance structure accommodating (i.e. high concentration fixed charge district 10), dielectric buried layer 9 and active layer 4 for this power device or circuit.
Claims (9)
1. a linear pitch distribution fixed charge island SOI pressure-resistance structure, comprise the substrate layer (8), dielectric buried layer (9) and the active layer (4) that stack successively from bottom to top, it is characterized in that: also comprise multiple concentration further and be more than or equal to 1 × 10
13cm
-2high concentration fixed charge district (10); These high concentration fixed charge districts (10) are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts (10) are all positioned at dielectric buried layer (9) top, and arrange in being interrupted each other; On horizontal withstand voltage direction, the spacing between every 2 high concentration fixed charge districts (10) is linearly successively decreased or increases progressively.
2. a kind of linear pitch distribution fixed charge island according to claim 1 SOI pressure-resistance structure, is characterized in that: the concentration of all high concentration fixed charge districts (10) is all equal.
3. a kind of linear pitch distribution fixed charge island according to claim 1 SOI pressure-resistance structure, it is characterized in that: described high concentration fixed charge district (10) is injected in dielectric buried layer (9) by ion implantation mode, and the ion injected is caesium cation, sodium cation, iodine cation, boron cation and/or siliconium ion.
4. a kind of linear pitch distribution fixed charge island according to claim 1 SOI pressure-resistance structure, is characterized in that: the height of all high concentration fixed charge districts (10) is all equal.
5. a kind of linear pitch distribution fixed charge island according to claim 1 SOI pressure-resistance structure, is characterized in that: the top of all high concentration fixed charge districts (10) is equal to the distance of dielectric buried layer (9) upper surface.
6. a kind of linear pitch distribution fixed charge island according to claim 1 SOI pressure-resistance structure, is characterized in that: the heat radiation silicon window (15) described dielectric buried layer (9) having up/down perforation substrate layer (8) and active layer (4).
7. there is the SOI power device with linear pitch distribution fixed charge island SOI pressure-resistance structure in claim 1 ~ 6 described in any one, it is characterized in that: comprise the substrate layer (8), dielectric buried layer (9) and the active layer (4) that stack successively from bottom to top; On both sides in described active layer (4), edge is provided with source region (2), channel region (7) and drain region (5); Source region (2) and channel region (7) are affixed, and edge on the side being simultaneously arranged on active layer (4); Edge on the opposite side that drain region (5) is then arranged on active layer (4); The surface of active layer (4) is provided with source electrode (1), grid (3) and drain electrode (6); Source electrode (1) is overlying on the top of source region (2), and grid (3) is overlying on the top of source region (2) and channel region (7) simultaneously; Drain electrode (6) is overlying on the top of drain region (5); It is characterized in that: also comprise multiple concentration further and be more than or equal to 1 × 10
13cm
-2high concentration fixed charge district (10); These high concentration fixed charge districts (10) are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts (10) are all positioned at dielectric buried layer (9) top, and arrange in being interrupted each other; Extremely drain on the direction of (6) in horizontal withstand voltage direction and source electrode (1), the spacing between every 2 high concentration fixed charge districts (10) is linearly successively decreased or increases progressively.
8. there is the SOI power device with linear pitch distribution fixed charge island SOI pressure-resistance structure in claim 1 ~ 6 described in any one, it is characterized in that: comprise the substrate layer (8), dielectric buried layer (9) and the active layer (4) that stack successively from bottom to top; On both sides in described active layer (4), edge is provided with negative electrode charged region (12), channel region (7) and anode charged region (13); Negative electrode charged region (12) and channel region (7) are affixed, and edge on the side being simultaneously arranged on active layer (4); Edge on the opposite side that anode charged region (13) is then arranged on active layer (4); The surface of active layer (4) is provided with negative electrode (11), grid (3) and anode (14); Negative electrode (11) is overlying on the top of negative electrode charged region (12), and grid (3) is overlying on the top of negative electrode charged region (12) and channel region (7) simultaneously; Anode (14) is overlying on the top of anode charged region (13); It is characterized in that: also comprise multiple concentration further and be more than or equal to 1 × 10
13cm
-2high concentration fixed charge district (10); These high concentration fixed charge districts (10) are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts (10) are all positioned at dielectric buried layer (9) top, and arrange in being interrupted each other; Laterally withstand voltage direction and anode (14) are on the direction of negative electrode (11), the spacing between every 2 high concentration fixed charge districts (10) is linearly successively decreased or increases progressively.
9. there is the SOI power device with linear pitch distribution fixed charge island SOI pressure-resistance structure in claim 1 ~ 6 described in any one, it is characterized in that: comprise the substrate layer (8), dielectric buried layer (9) and the active layer (4) that stack successively from bottom to top; On both sides in described active layer (4), corner place is provided with negative electrode charged region (12) and anode charged region (13) respectively; The surface of active layer (4) is provided with negative electrode (11) and anode (14); Negative electrode (11) is overlying on the top of negative electrode charged region (12); Anode (14) is overlying on the top of anode charged region (13); It is characterized in that: also comprise multiple concentration further and be more than or equal to 1 × 10
13cm
-2high concentration fixed charge district (10); These high concentration fixed charge districts (10) are formed by dielectric material, and charge polarity is just; These high concentration fixed charge districts (10) are all positioned at dielectric buried layer (9) top, and arrange in being interrupted each other; Laterally withstand voltage direction and anode (14) are on the direction of negative electrode (11), the spacing between every 2 high concentration fixed charge districts (10) is linearly successively decreased or increases progressively.
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|---|---|---|---|
| CN201420611626.1U CN204102902U (en) | 2014-10-22 | 2014-10-22 | Linear pitch distribution fixed charge island SOI pressure-resistance structure and power device |
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|---|---|---|---|
| CN201420611626.1U CN204102902U (en) | 2014-10-22 | 2014-10-22 | Linear pitch distribution fixed charge island SOI pressure-resistance structure and power device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505403A (en) * | 2015-01-28 | 2015-04-08 | 桂林电子科技大学 | SOI power device with medium layer fixed charges |
| CN104269403B (en) * | 2014-10-22 | 2017-08-22 | 桂林电子科技大学 | Linear spacing distribution fixed charge island SOI pressure-resistance structures and power device |
| CN112750845A (en) * | 2020-12-29 | 2021-05-04 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
-
2014
- 2014-10-22 CN CN201420611626.1U patent/CN204102902U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269403B (en) * | 2014-10-22 | 2017-08-22 | 桂林电子科技大学 | Linear spacing distribution fixed charge island SOI pressure-resistance structures and power device |
| CN104505403A (en) * | 2015-01-28 | 2015-04-08 | 桂林电子科技大学 | SOI power device with medium layer fixed charges |
| CN112750845A (en) * | 2020-12-29 | 2021-05-04 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
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