CN107123690A - Solid plasma PIN diode - Google Patents

Solid plasma PIN diode Download PDF

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Publication number
CN107123690A
CN107123690A CN201710313883.5A CN201710313883A CN107123690A CN 107123690 A CN107123690 A CN 107123690A CN 201710313883 A CN201710313883 A CN 201710313883A CN 107123690 A CN107123690 A CN 107123690A
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China
Prior art keywords
areas
areas step
pin diode
solid plasma
soi substrate
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CN201710313883.5A
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CN107123690B (en
Inventor
王斌
胡辉勇
陶春阳
苏汉
史小卫
舒斌
郝敏如
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Xidian University
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Xidian University
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof  ; Multistep manufacturing processes therefor
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/86Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
    • H01L29/861Diodes
    • H01L29/868PIN diodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof  ; Multistep manufacturing processes therefor
    • H01L29/02Semiconductor bodies ; Multistep manufacturing processes therefor
    • H01L29/06Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
    • H01L29/0684Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by the shape, relative sizes or dispositions of the semiconductor regions or junctions between the regions

Abstract

The present invention relates to a kind of solid plasma PIN diode.The device includes SOI substrate (101);First P areas step (102), the first N areas step (103), the 2nd P areas step (104), the 2nd N areas step (105), the 3rd P areas step (106) and the 3rd N areas step (107), are respectively arranged in SOI substrate (101) and positioned at the both sides of SOI substrate (101);Wherein, the 2nd P areas step (104) and the 2nd N areas step (105) are located at the downside of the first P areas step (102) and the first N areas step (103) respectively;3rd P areas step (106) and the 3rd N areas step (107) are located at the downside of the 2nd P areas step (104) and the 2nd N areas step (105) respectively.The present invention by preparing multiple step formation multilayer raceway grooves on soi substrates, superposition using high concentration carrier in two raceway grooves causes whole intrinsic region carriers concentration to reach uniformly, so as to improve the power density of horizontal PIN diode, the solid plasma bulk properties of PIN diode is enhanced.

Description

Solid plasma PIN diode
Technical field
The present invention relates to technical field of integrated circuits, more particularly to a kind of solid plasma PIN diode.
Background technology
Currently, the electronics and information industry using integrated circuit as core has surmounted traditional work that automobile, oil, steel are representative Industry turns into the largest industrial sector, the powerful engine and rich foundation stone of digital Age of being marched toward as transformation and pulling conventional industries.Partly lead Body device as integrated circuit elemental device, in the field such as consumer electronics, computer and peripheral hardware, network service, in intelligence Mobile phone, tablet personal computer, track traffic, new energy, hybrid vehicle, solid-state illumination, portable medical electronics, intelligence wearing etc. are new Emerging market, is widely applied.
Horizontal PIN diode is the important semiconductor devices for producing solid state plasma.Found through theoretical research, solid-state etc. Ion PIN diode is when adding Dc bias, and DC current can form free carrier (electronics and hole) composition on its surface Solid state plasma, the plasma has metalloid characteristic so that the plasma can receive, radiate and reflect electromagnetism The microwave transmission characteristic of ripple, its radiation characteristic and surface plasma, concentration and it is distributed closely related.The PIN studied at present Diode only has individual layer raceway groove, and so when adding Dc bias, the Carrier Profile in intrinsic region can be uneven, intrinsic region The deeper local carrier concentration of interior depth is lower so that heating region performance degradation in transmission and radiated electromagnetic wave, And the power density of this diode is low so that the application of this single-groove road PiN diodes is limited by very large.
Therefore, a kind of solid plasma PIN diode how is made come so that carriers distribution in intrinsic region becomes uniform Just become particularly important.
The content of the invention
Therefore, to solve the technological deficiency and deficiency that prior art is present, the present invention proposes a kind of solid plasma PIN bis- Pole pipe.
Specifically, a kind of solid plasma PIN diode that one embodiment of the invention is proposed, including:
SOI substrate 101;
First P areas step 102, the first N areas step 103, the 2nd P areas step 104, the 2nd N areas step 105, the 3rd P areas platform The N areas step 107 of rank 106 and the 3rd, is respectively arranged in the SOI substrate 101 and positioned at the both sides of the SOI substrate 101;Its In,
2nd P areas step 104 and the 2nd N areas step 105 are located at the first P areas step 102 and institute respectively State the downside of the first N areas step 103;
3rd P areas step 106 and the 3rd N areas step 107 are located at the 2nd P areas step 104 and institute respectively State the downside of the 2nd N areas step 105.
In one embodiment of the invention, in addition to isolated material 108, the isolated material 108 is filled in making institute State the first P areas step 102, the first N areas step 103, the 2nd P areas step 104, the 2nd N areas step 105, institute State in the groove formed when the 3rd P areas step 106 and the 3rd N areas step 107.
In one embodiment of the invention, in addition to the first lead 109 and the second lead 110;Wherein,
First lead 109 connects the first P areas step 102, the 2nd P areas step 104 and the 3rd P areas step 106;
Second lead 110 connects the first N areas step 103, the 2nd N areas step 105 and the 3rd N areas step 107。
In one embodiment of the invention, the doping type of the SOI substrate 101 is p-type, and doping concentration is 1 × 1014 ~9 × 1014cm-3
In one embodiment of the invention, the thickness of top layer silicon 1003 is 100 μm in the SOI substrate 101.
In one embodiment of the invention, the upper surface of the first P areas step 102 and the first N areas step 103 Distance respectively away from the upper surface of top layer silicon 1003 is 30~100nm;2nd P areas step 104 and the 2nd N areas platform Distance of the upper surface of rank 105 respectively away from the first P areas step 102 and the upper surface of the first N areas step 103 be 100~ 300nm;The upper surface of 3rd P areas step 106 and the 3rd N areas step 107 is away from the 2nd P areas step 104 and institute The distance for stating the upper surface of the 2nd N areas step 105 is 300~500nm.
In one embodiment of the invention, the first P areas step 102, the first N areas step 103, described second P areas step 104, the 2nd N areas step 105, the 3rd P areas step 106 and the 3rd N areas step 107 thickness it is equal For 100nm.
In one embodiment of the invention, the first P areas step 102, the first N areas step 103, described second P areas step 104, the 2nd N areas step 105, the 3rd P areas step 106 and the 3rd N areas step 107 doping it is dense Degree is 1 × 1018~5 × 1018cm-3
In one embodiment of the invention, in addition to passivation layer 111, isolated material 108, first lead are arranged at 109 and the upper surface of second lead 110.
In one embodiment of the invention, the material of the passivation layer 111 is silicon nitride.
PIN diode of the present invention by preparing multiple step formation multilayer raceway grooves on soi substrates, when on contact electrode During additional forward voltage, the superposition using high concentration carrier in two raceway grooves causes whole intrinsic region carriers concentration Reach uniformly, so as to improve the power density of horizontal PIN diode, enhance the solid plasma bulk properties of PIN diode.
By the detailed description below with reference to accompanying drawing, other side and feature of the invention becomes obvious.But should know Road, the accompanying drawing is only the purpose design explained, not as the restriction of the scope of the present invention, because it should refer to Appended claims.It should also be noted that unless otherwise noted, it is not necessary to scale accompanying drawing, they only try hard to concept Ground illustrates structure described herein and flow.
Brief description of the drawings
Below in conjunction with accompanying drawing, the embodiment to the present invention is described in detail.
Fig. 1 is a kind of structural representation of solid plasma PIN diode provided in an embodiment of the present invention;
Fig. 2 a- Fig. 2 r are a kind of preparation method schematic diagram of solid plasma PIN diode of the embodiment of the present invention.
Fig. 3 is the structural representation of another solid plasma PIN diode provided in an embodiment of the present invention.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention Embodiment be described in detail.
Embodiment one
Fig. 1 is referred to, Fig. 1 is a kind of structural representation of solid plasma PIN diode provided in an embodiment of the present invention. Solid plasma PIN diode 10 of the present invention includes:
SOI substrate 101;
First P areas step 102, the first N areas step 103, the 2nd P areas step 104, the 2nd N areas step 105, the 3rd P areas platform The N areas step 107 of rank 106 and the 3rd, is respectively arranged in the SOI substrate 101 and positioned at the both sides of the SOI substrate 101;Its In,
2nd P areas step 104 and the 2nd N areas step 105 are located at the first P areas step 102 and institute respectively State the downside of the first N areas step 103;
3rd P areas step 106 and the 3rd N areas step 107 are located at the 2nd P areas step 104 and institute respectively State the downside of the 2nd N areas step 105.
Alternatively, in addition to isolated material 108, the isolated material 108 be filled in making the first P areas step 102, First N areas step 103, the 2nd P areas step 104, the 2nd N areas step 105, the 3rd P areas step 106 and In the groove formed during the 3rd N areas step 107.
Alternatively, in addition to the first lead 109 and the second lead 110;Wherein,
First lead 109 connects the first P areas step 102, the 2nd P areas step 104 and the 3rd P areas step 106;
Second lead 110 connects the first N areas step 103, the 2nd N areas step 105 and the 3rd N areas step 107。
Alternatively, the doping type of the SOI substrate 101 is p-type, and doping concentration is 1 × 1014~9 × 1014cm-3
Alternatively, the thickness of top layer silicon 1003 is 100 μm in the SOI substrate 101.
Alternatively, the upper surface of the first P areas step 102 and the first N areas step 103 is respectively away from the top layer silicon The distance of 1003 upper surfaces is 30~100nm;The upper surface of 2nd P areas step 104 and the 2nd N areas step 105 point The other distance away from the first P areas step 102 and the upper surface of the first N areas step 103 is 100~300nm;3rd P The upper surface of area's step 106 and the 3rd N areas step 107 is away from the 2nd P areas step (104) and the 2nd N areas step The distance of 105 upper surfaces is 300~500nm.
Alternatively, the first P areas step 102, the first N areas step 103, the 2nd P areas step 104, described The thickness of 2nd N areas step 105, the 3rd P areas step 106 and the 3rd N areas step 107 is 100nm.
Alternatively, the first P areas step 102, the first N areas step 103, the 2nd P areas step 104, described The doping concentration of 2nd N areas step 105, the 3rd P areas step 106 and the 3rd N areas step 107 is 1 × 1018~5 ×1018cm-3
Alternatively, in addition to passivation layer 111, isolated material 108, first lead 109 are arranged at and described second is drawn The upper surface of line 110.
Alternatively, the material of the passivation layer 111 is silicon nitride.
The conventional solid plasma PIN diode made is current-carrying in individual layer raceway groove, the intrinsic region in excited state Sub- concentration distribution is uneven with causing radiation characteristic to be deteriorated.Many channeling diodes of the present invention solve intrinsic region carriers point This problem of cloth inequality, improves the performance of diode.
Embodiment two
Refer to a kind of system for solid plasma PIN diode that Fig. 2 a- Fig. 2 r, Fig. 2 a- Fig. 2 r are the embodiment of the present invention Preparation Method schematic diagram, the preparation method of other kinds of many raceway groove PIN diodes is similar with this example, comprises the following steps that:
S10, selection SOI substrate.
Fig. 2 a are referred to, the crystal orientation being somebody's turn to do is (100), and the doping type of the SOI substrate 201 is p-type, and doping concentration is 1014cm-3;The thickness of the top layer silicon of SOI substrate 201 is 100 μm.
S20, in described one layer of silicon nitride of SOI substrate surface deposition.
Fig. 2 b are referred to, using chemical vapor deposition (Chemical Vapor Deposition, abbreviation CVD) method, The deposit silicon nitride layer 202 in SOI substrate 201.
S30, etching SOI substrate formation active area groove.
Fig. 2 c are referred to, active area figure is formed on silicon nitride layer 202 using photoetching process, dry etch process is utilized In specified location etch-protecting layer silicon nitride layer 202 and top layer silicon so as to form active area groove 203.
S40, active area surrounding planarization process.
Fig. 2 d are referred to, four the week side of boss walls of active area are aoxidized so that the four the week side of boss walls formation oxide layer 204 of active area.
Fig. 2 e are referred to, etch the surrounding sidewall oxide of active area to complete the four of active area using wet-etching technology The week side of boss wall is planarized,
S50, deposit layer of silicon dioxide.
Fig. 2 f are referred to, layer of silicon dioxide layer 205 is deposited in whole material surface using CVD method.
S60, photoetching silicon dioxide layer.
Fig. 2 g are referred to, P areas figure is formed in silicon dioxide layer 205 using photoetching process, wet-etching technology is utilized Remove the silicon dioxide layer 205 on P areas figure.
S70, the P areas for forming first layer raceway groove, second layer raceway groove and third layer raceway groove.
Fig. 2 h are referred to, specific practice can be:Using the method for original position doping, in the P areas figure of whole substrate surface Upper deposit P-type silicon forms the P areas 2063 in the P areas 2061, the P areas 2062 of second layer raceway groove and third layer raceway groove of first layer raceway groove, The doping concentration in P areas is controlled by controlling gas flow.
S80, planarizing substrate surface.
Fig. 2 i are referred to, specific practice can be:Make P areas surface flattening first with dry etch process, recycle wet Method etching technics removes the silicon dioxide layer 205 of substrate surface.
S90, the substrate surface deposit layer of silicon dioxide.
Fig. 2 j are referred to, specific practice can be:Using CVD method silicon dioxide layer 207 is deposited in whole material surface.
S100, photoetching silicon dioxide layer.
Fig. 2 k are referred to, N areas figure is formed in silicon dioxide layer 207 using photoetching process;Utilize wet-etching technology Remove the silicon dioxide layer 207 in N areas.
S110, the N areas for forming first layer raceway groove, second layer raceway groove and third layer raceway groove.
Fig. 2 l are referred to, using the method for original position doping, N-type silicon shape is deposited on the N areas figure on the surface of SOI substrate 201 Into the N areas 2083 in the N areas 2081 of first layer raceway groove, the N areas 2082 of second layer raceway groove and third layer raceway groove, by controlling gas stream Measure to control the doping concentration in N areas.
S120, planarizing substrate surface.
Fig. 2 m are referred to, make N areas surface flattening first with dry etch process, recycle wet-etching technology to remove whole The silicon dioxide layer 207 of individual material surface.
S130, substrate surface planarization.
Refer to Fig. 2 n, it is possible to use CMP method, the silicon nitride layer 202 of the substrate surface is removed, so that entirely Material surface is planarized.
S140, deposit silica.
Fig. 2 o are referred to, one layer of isolated material silica 209 is deposited in whole material surface using CVD method.
S150, impurity activation.
In 950-1150, DEG C annealing 0.5~2 minute makes the impurity activation of ion implanting and promoted miscellaneous in active area Matter.
S160, in P, N contact zone lithography fair lead.
Fig. 2 p are refer to, the lithography fair lead 210 on silica 209.
S170, formation lead.
Fig. 2 q are refer to, can be in the splash-proofing sputtering metal of fairlead 210, alloying formation metal silicide, and etch away surface Metal;Again in whole material surface splash-proofing sputtering metal 211, photoetching lead, and lead is connected.
S180, Passivation Treatment, photoetching PAD.
Fig. 2 r are refer to, deposit silicon nitride (SiN) formation passivation layer 212, photoetching PAD can be passed through.Ultimately form solid-state Plasma PIN diode.
The conventional solid plasma PIN diode made is current-carrying in individual layer raceway groove, the intrinsic region in excited state Sub- concentration distribution is uneven with causing radiation characteristic to be deteriorated.Many channeling diodes of the present invention solve intrinsic region carriers point This problem of cloth inequality, improves the performance of diode.
Embodiment three
Fig. 3 is refer to, Fig. 3 is the structural representation of another solid plasma PIN diode provided in an embodiment of the present invention Figure.The solid plasma PIN diode is made of the preparation method shown in above-described embodiment.Specifically, the solid plasma PIN diode prepares formation in SOI substrate 301, and the P areas 301 of the raceway groove of PIN diode first, N areas 302, the second raceway groove P areas 303, the P areas 305 in N areas 304 and triple channel, N areas 306 and the I areas that are laterally positioned between P areas and N areas are respectively positioned on this In the top layer silicon 3011 of SOI substrate.
In summary, a kind of solid plasma that specific case used herein is provided invention embodiment The embodiment of PIN diode is set forth, the explanation of above example be only intended to help to understand the present invention method and Its core concept;Simultaneously for those of ordinary skill in the art, according to the thought of the present invention, in embodiment and should With will change in scope, in summary, this specification content should not be construed as limiting the invention, of the invention Protection domain should be defined by appended claim.

Claims (10)

1. a kind of solid plasma PIN diode, it is characterised in that including:
SOI substrate (101);
First P areas step (102), the first N areas step (103), the 2nd P areas step (104), the 2nd N areas step (105), the 3rd P Area's step (106) and the 3rd N areas step (107), are respectively arranged in the SOI substrate (101) and positioned at the SOI substrate (101) both sides;Wherein,
The 2nd P areas step (104) and the 2nd N areas step (105) respectively be located at the first P areas step (102) and The downside of the first N areas step (103);
The 3rd P areas step (106) and the 3rd N areas step (107) respectively be located at the 2nd P areas step (104) and The downside of the 2nd N areas step (105).
2. solid plasma PIN diode according to claim 1, it is characterised in that also including isolated material (108), The isolated material (108) is filled in making the first P areas step (102), the first N areas step (103), described second P areas step (104), the 2nd N areas step (105), the 3rd P areas step (106) and the 3rd N areas step (107) When the groove that is formed in.
3. solid plasma PIN diode according to claim 1, it is characterised in that also including the first lead (109) and Second lead (110);Wherein,
First lead (109) connects the first P areas step (102), the 2nd P areas step (104) and the 3rd P areas platform Rank (106);
Second lead (110) connects the first N areas step (103), the 2nd N areas step (105) and the 3rd N areas platform Rank (107).
4. solid plasma PIN diode according to claim 1, it is characterised in that SOI substrate (101) mix Miscellany type is p-type, and doping concentration is 1 × 1014~9 × 1014cm-3
5. solid plasma PIN diode according to claim 3, it is characterised in that pushed up in the SOI substrate (101) The thickness of layer silicon (1003) is 100 μm.
6. solid plasma PIN diode according to claim 3, it is characterised in that the first P areas step (102) Distance with the upper surface of the first N areas step (103) respectively away from the top layer silicon (1003) upper surface is 30~100nm; The upper surface of the 2nd P areas step (104) and the 2nd N areas step (105) is respectively away from the first P areas step (102) Distance with the first N areas step (103) upper surface is 100~300nm;The 3rd P areas step (106) and the described 3rd Distance of the upper surface of N areas step (107) away from the 2nd P areas step (104) and the 2nd N areas step (105) upper surface For 300~500nm.
7. solid plasma PIN diode according to claim 1, it is characterised in that the first P areas step (102), The first N areas step (103), the 2nd P areas step (104), the 2nd N areas step (105), the 3rd P areas platform The thickness of rank (106) and the 3rd N areas step (107) is 100nm.
8. solid plasma PIN diode according to claim 1, it is characterised in that the first P areas step (102), The first N areas step (103), the 2nd P areas step (104), the 2nd N areas step (105), the 3rd P areas platform The doping concentration of rank (106) and the 3rd N areas step (107) is 1 × 1018~5 × 1018cm-3
9. solid plasma PIN diode according to claim 1, it is characterised in that also including passivation layer (111), if It is placed in the upper surface of isolated material (108), first lead (109) and second lead (110).
10. solid plasma PIN diode according to claim 9, it is characterised in that the material of the passivation layer (111) Expect for silicon nitride.
CN201710313883.5A 2017-05-05 2017-05-05 Solid-state plasma PIN diode Active CN107123690B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005093584A (en) * 2003-09-16 2005-04-07 Matsushita Electric Ind Co Ltd Manufacturing method of mesa type semiconductor device
CN103915511A (en) * 2012-12-28 2014-07-09 现代自动车株式会社 Schottky barrier diode and method of manufacturing the same
CN206961836U (en) * 2017-05-05 2018-02-02 西安科锐盛创新科技有限公司 Horizontal PIN diode

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005093584A (en) * 2003-09-16 2005-04-07 Matsushita Electric Ind Co Ltd Manufacturing method of mesa type semiconductor device
CN103915511A (en) * 2012-12-28 2014-07-09 现代自动车株式会社 Schottky barrier diode and method of manufacturing the same
CN206961836U (en) * 2017-05-05 2018-02-02 西安科锐盛创新科技有限公司 Horizontal PIN diode

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