CN201004713Y - Single film capacitance speaker chip - Google Patents
Single film capacitance speaker chip Download PDFInfo
- Publication number
- CN201004713Y CN201004713Y CNU2006201194081U CN200620119408U CN201004713Y CN 201004713 Y CN201004713 Y CN 201004713Y CN U2006201194081 U CNU2006201194081 U CN U2006201194081U CN 200620119408 U CN200620119408 U CN 200620119408U CN 201004713 Y CN201004713 Y CN 201004713Y
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- overarm
- backstop
- vibrating diaphragm
- frame
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Abstract
The utility model is a single film capacitive microphone chip, and relates to the microphone art, for a single film capacitive microphone, adopting a capacitive structure comprising a single film and a substrate. A vibrating film is connected with a cantilever support upper surface through a frame of a cantilever to form a solid vibrating structure that the cantilever and the vibrating film are not in the same plane. The cantilever is flexible, and the vibrating film is hard, so the deformation is mainly on the cantilever when vibrating, and the vibrating film maintain level movement basically. A vibrating film edge us provided with a plurality of small holes for improving the performance of the frequency response, and a corrosion hole; additionally, the chip is provided with a vibration stop gear. The utility model has the advantages of high sensitivity, low noise, frequency range, small volume for the chip, simple manufacturing process, and easy batch production.
Description
Technical field
The utility model relates to the mike technique field, particularly a kind of single membrane capacitance type microphone chip.
Background technology
The history in existing more than 20 year of semiconductor microphone chip research, during miscellaneous microphones on silicon chip, be developed realization successively.Wherein, main the most popular a kind of be capacitance type silicon microphone.Characteristics such as capacitance type silicon microphone has not only that volume is little, highly sensitive, good frequency response, noise are low the more important thing is to have very wide working temperature, applicable to automatic production line operation and bad working environment such as SMT.
For capacitance type silicon microphone, present report and patent, pair membrane capacitance structures that adopt utilize micromachining technology to make vibrating diaphragm and the two films of backplane on silicon chip more, form capacitance structure, its vibrating diaphragm softness, backplane is hard.Under the effect of acoustic pressure, vibrating diaphragm produces deformation, and the capacitance between vibrating diaphragm and the backplane changes, and the capacitance variations value reflects the size of acoustic pressure.Research, report for the single membrane capacitance type silicon microphone are rare, document Fabrication ofsilicon condenser microphoneusing single wafer technology, Journal of microelectromechanical systems, VOL.1.No.3,1992, p147-154, reported a kind of single membrane capacitance type silicon microphone, utilized monofilm and silicon base to form capacitance structure, monofilm---vibrating diaphragm is under the effect of acoustic pressure, produce deformation, induction acoustic pressure size.Two membrane capacitance formula semiconductor microphones will be made double-deck free film in substrate, the manufacture craft more complicated, and be faced with technological problemses such as solution " soft backplane ", adhesion.Compare with two membrane capacitance formula semiconductor microphones, the single membrane capacitance type semiconductor microphone is simple in structure, realize easily, but the monofilm semicoductor capacitor formula microphone of having reported exists deficiency, mainly show: one, at the bottom of the sensitivity: silicon base is served as the function of backplane, consider the acoustics requirement, will leave hole in substrate, be subjected to process technology limit, the sound hole site must be over against the zone line of vibrating diaphragm, and the zone line mechanical sensitivity height of vibrating diaphragm, the edge is low, and the waste in vibrating diaphragm centre position has reduced the sensitivity of microphone, two, Frequency Response is poor: just over against the centre of vibrating diaphragm, microphone has relatively poor Frequency Response during the vibrating diaphragm vibration in the sound hole.
The utility model content
The purpose of this utility model is the problem that exists in the existing single membrane capacitance type microphone chip technology in order to solve, at the deficiency that exists in the current single membrane capacitance type semiconductor microphone structural design, a kind of new construction has been proposed, mainly comprise: overarm, vibrating diaphragm, support, substrate, be to be vibrating diaphragm and the vibrational structure of hanging oneself from a beam and constituting on supporting, supporting on the substrate, in substrate one back of the body chamber is arranged over against the vibrating diaphragm middle part, there are a plurality of apertures at the vibrating diaphragm edge.This new construction, vibrating diaphragm is connected by the overarm of softness, and vibrating diaphragm is the Oscillation Amplitude unanimity everywhere, has improved sensitivity; The vibrating diaphragm edge is provided with countless apertures and has improved Frequency Response.
For achieving the above object, technical solution of the present utility model provides a kind of single membrane capacitance type microphone chip, be semiconductor microphone chip, comprise substrate, overarm support, backstop support, vibrating diaphragm, overarm, backstop frame, overarm frame and upper and lower electrode;
Wherein, there is a through hole at the substrate center, is back of the body chamber, and upper surface of substrate is fixed with frame shape backstop and supports, and backstop supports upper surface and is fixed with frame shape backstop frame, and the backstop centre of support is similar with the through hole at backstop frame center, and the aperture is suitable for reading greater than back of the body chamber;
Through hole periphery at backstop centre of support and backstop frame center is provided with the perforation groove, supports and a side of backstop frame has through hole in backstop, and the interior upper surface of substrate of through hole is provided with bottom electrode;
Vibrating diaphragm is overlying on the back of the body chamber, is positioned at the center through hole that backstop supports, and there is plurality of small holes the vibrating diaphragm marginal portion, and the end conduction of central part and overarm is fixed; The other end of overarm has the overarm frame, and the overarm frame is positioned at the perforation groove of backstop centre of support through hole periphery, and its upper surface is installed with top electrode, and lower surface links to each other with overarm supports insulative formula, and overarm is supported the lower surface insulation and is fixed in the substrate;
The overarm frame of its vibrating diaphragm by overarm and overarm supports upper surface with overarm and links to each other, forms overarm, vibrating diaphragm not at conplane three-dimensional vibrational structure, for vibrating diaphragm under hanging oneself from a beam;
Vibrating diaphragm, overarm and overarm frame are conductive layer or the composite bed that comprises conductive layer;
The vibrating diaphragm center is relative up and down with back of the body upper shed center, chamber, and vibrating diaphragm is greater than back of the body chamber upper shed area, and the plurality of small holes of vibrating diaphragm marginal portion is in back of the body chamber upper shed zone in addition;
The backstop frame is provided with backstop, be the through hole periphery at backstop frame center, evenly be provided with most the anti-concussion of the dentation that level puts in hole backstops, backstop is positioned at the plurality of small holes top of vibrating diaphragm marginal portion, it is projected in the vibrating diaphragm marginal portion, and the space is arranged between the vibrating diaphragm.
A kind of single membrane capacitance type microphone chip is semiconductor microphone chip, comprises substrate, overarm support, backstop support, vibrating diaphragm, overarm, backstop frame, overarm frame and upper and lower electrode;
Wherein, there is a through hole at the substrate center, is back of the body chamber, and upper surface of substrate is fixed with frame shape backstop and supports, and backstop supports upper surface and is fixed with frame shape backstop frame, and the backstop centre of support is similar with the through hole at backstop frame center, and the aperture is suitable for reading greater than back of the body chamber;
Through hole periphery at backstop centre of support and backstop frame center is provided with the perforation groove, supports and a side of backstop frame has through hole in backstop, and the interior upper surface of substrate of through hole is provided with bottom electrode;
Vibrating diaphragm is overlying on the back of the body chamber, is positioned at the center through hole that backstop supports, and there is plurality of small holes the vibrating diaphragm marginal portion, and the end conduction of central part and overarm is fixed; The other end of overarm has the overarm frame, and the overarm frame is positioned at the perforation groove of backstop centre of support through hole periphery, and its upper surface is installed with top electrode, and lower surface links to each other with overarm supports insulative formula, and overarm is supported the lower surface insulation and is fixed in the substrate;
The overarm frame of its vibrating diaphragm by overarm and overarm supports upper surface with overarm and links to each other, forms overarm, vibrating diaphragm not at conplane three-dimensional vibrational structure, for vibrating diaphragm on hanging oneself from a beam;
Vibrating diaphragm, overarm and overarm frame are conductive layer or the composite bed that comprises conductive layer;
The vibrating diaphragm center is relative up and down with back of the body upper shed center, chamber, and vibrating diaphragm is greater than back of the body chamber upper shed area, and the plurality of small holes of vibrating diaphragm marginal portion is in back of the body chamber upper shed zone in addition;
The backstop frame is provided with backstop, is on the perforation recess channels of the through hole periphery at backstop centre of support and backstop frame center, and most the anti-concussion of strips backstops are set, and backstop two ends and backstop frame are connected, and are positioned on the overarm, and between hanging oneself from a beam the space are arranged.
Described single membrane capacitance type microphone chip, its described substrate are that resistivity is less than 10
-2The Semiconducting Silicon Materials of Ω .cm.
Described single membrane capacitance type microphone chip, its described overarm support and backstop are supported for insulating material.
Described single membrane capacitance type microphone chip, its described insulating material is a silica, is LTO, PSG, TEOS.
Described single membrane capacitance type microphone chip, its described vibrating diaphragm, overarm, overarm frame are the polysilicon of mixing phosphorus or boron-doping.
Described single membrane capacitance type microphone chip, its described overarm is the strip straight beam.
Described single membrane capacitance type microphone chip, on its described vibrating diaphragm, vibrating diaphragm and the thickness of overarm tie point with interior zone are greater than vibrating diaphragm and overarm tie point zone in addition.
Described single membrane capacitance type microphone chip, the spacing between its described vibrating diaphragm and the overarm is the 1-2 micron.
The utility model is primarily aimed at the sensitivity that how to improve microphone chip and improves its Frequency Response, a kind of single membrane capacitance type microphone chip with special suspension structure has been proposed, the overarm of the utility model chip and vibrating diaphragm be not or not same plane, be stereochemical structure, the overarm the position on the vibrating diaphragm or under, overarm connects vibrating diaphragm and frame on every side, formed the structure that vibrating diaphragm is hung oneself from a beam and supported, the distortion when vibration of this structure concentrates in the soft overarm, vibrating diaphragm keeps translation basically on direction of vibration, vibrating diaphragm mechanical sensitivity everywhere is basic identical.
Between existing vibrating diaphragm edge and the substrate very little spacing is arranged, will cause microphone that relatively poor Frequency Response is arranged.The utility model is used to improve Frequency Response at a plurality of apertures of vibrating diaphragm edge designs, simultaneously in technical process these apertures also as etch pit, by original sacrifice layer under the pitting corrosion vibrating diaphragm.
The utility model overarm connects vibrating diaphragm and chip base, and in order to reach the sensitivity of hope, suspension beam structure is very soft, if chip falls, vibrating diaphragm comes off easily, and the utility model has designed antidetonation and swung backstop.
The utility model silicon microphone chip structure, it is simple to have manufacture craft, high sensitivity, low noise, broadband character.
Description of drawings
Fig. 1 is the utility model single membrane capacitance type microphone chip vertical view;
Fig. 2 is the profile of the utility model single membrane capacitance type microphone chip along Fig. 1 dotted line;
Fig. 3 is the utility model single membrane capacitance type silicon microphone chip upward view;
Fig. 4 is the another kind of single membrane capacitance type microphone chip vertical view of the utility model;
Fig. 5 is the profile of the another kind of single membrane capacitance type microphone chip of the utility model along Fig. 4 dotted line;
Fig. 6 is the another kind of single membrane capacitance type microphone chip vibrating diaphragm of a utility model layer upward view.
Embodiment
The utility model has multiple multi-form embodiment, and accompanying drawing 1-6 is depicted as the utility model two preferred embodiments, below these two examples is elaborated.
Embodiment one
Be the utility model embodiment one as Figure 1-3, it is a kind of single membrane capacitance type microphone chip structure of the present utility model, as shown in Figure 1 and Figure 2, its characteristics for overarm last, vibrating diaphragm under the monofilm structure, be from bottom to top: substrate 21, overarm support 22, backstop support 23, vibrating diaphragm 24, overarm 25 and overarm frame 26, backstop 27 and backstop frame 28, also have bottom electrode 29, top electrode 30 in addition, vibrating diaphragm 24 edges and substrate 21 constitute capacitance structure.
Wherein, there is a through hole at substrate 21 centers, are back of the body chamber 31, substrate 21 upper surfaces are fixed with frame shape backstop and support 23, backstop supports 23 upper surfaces and is fixed with frame shape backstop frame 28, and it is similar with the squared-shaped passthrough openings at backstop frame 28 centers that backstop supports 23 centers, and the aperture is suitable for reading greater than back of the body chamber 31.The through hole periphery that supports 23 centers and backstop frame 28 centers in backstop is provided with the perforation groove for four jiaos, backstop support 23 and a side of backstop frame 28 through hole 33 is arranged.Substrate 21 upper surfaces are provided with bottom electrode 29 in the through hole 33.
Vibrating diaphragm 24 is overlying on the back of the body chamber 31, is positioned at backstop and supports 23 central square through hole, and the gap of 2-4um is arranged between vibrating diaphragm 24 and the substrate 21.There are a plurality of apertures 32 vibrating diaphragm 24 marginal portions, and four jiaos of upper surfaces of central part are fixed with the end conduction of bar shaped overarm 25 respectively, constitute three-dimensional vibrational structure, vibrating diaphragm 24 and hang oneself from a beam the gap of 1-2um is arranged between 25; The other end of overarm 25 has overarm frame 26, overarm frame 26 is positioned at the perforation groove that backstop supports four jiaos of 23 center through holes, its upper surface is installed with top electrode 30, and lower surface supported for 22 non-conductive linking to each other with overarm, and non-conductive being fixed in the substrate 21 of 22 lower surfaces supported in overarm.
Through hole periphery at backstop frame 28 centers evenly is provided with most the anti-concussion of the dentation that level puts in hole backstops 27, and backstop 27 is positioned at a plurality of apertures 32 tops of vibrating diaphragm 24 marginal portions.
The back of the body 31 centers, chamber are relative with the center of vibrating diaphragm 24, and back of the body chamber 31 upper sheds are less than vibrating diaphragm 24 areas.Vibrating diaphragm 24, overarm 25 and substrate 21 are for electric conducting material or comprise conductive layer, and vibrating diaphragm 24 forms electric capacity with the zone of substrate 21 beyond back of the body chamber 31, and vibrating diaphragm 24 is connected with top electrode 30 conductions by overarm 25, and bottom electrode 29 is connected with substrate 21 conductions.
It is insulator that overarm support 22 and backstop support 23, can be the semi-conducting material silica, and silica can adopt LTO, PSG, TEOS.
Vibrating diaphragm 24 and overarm 25 conductions are fixed, and vibrating diaphragm 24, is realized by technology with interior zone at overarm 25 tie points, thicken, when guaranteeing overarm 25 vibrations, vibrating diaphragm 24 keeps favorable rigidity, at vibrating diaphragm 24 edges a plurality of apertures 32 are arranged, aperture 32 is positioned at the zone beyond back of the body chamber 31 upper sheds.The effect of aperture 32 is to improve Frequency Response when vibrating diaphragm 24 vibrations, simultaneously, also can be used as the sacrifice hole of original sacrifice layer between corrosion vibrating diaphragm 24 edges and the substrate 21.Vibrating diaphragm 24 can be selected polysilicon for use, by mixing phosphorus or boron, forms n type or p type conductive layer, as a battery lead plate of electric capacity.
When guaranteeing the chip earthquake, shock proof ability is arranged, make anti-concussion backstop 27, between backstop 27 and the vibrating diaphragm 24 space is arranged, backstop 27 upright projections drop in vibrating diaphragm 24 edges.
When chip is subjected to time spent of doing of acoustic pressure, vibrating diaphragm 24 passes to overarm 25 to the power that are subjected to, and overarm 25 produces distortion, because distortion mainly concentrates in the overarm 25, the in the vertical direction of vibrating diaphragm 24 almost keeps translation.The deflection of vibrating diaphragm 24 converts the variation of capacitance to, thereby realizes the function of transducer.
Embodiment two
Be depicted as the utility model embodiment two as Fig. 4-6, it is another kind of single membrane capacitance type microphone structure in the utility model, as Fig. 4, shown in Figure 5, basic structure is identical with embodiment one with material therefor, be from bottom to top: substrate 21, overarm support 22, backstop support 23, overarm 25 and overarm frame 26, vibrating diaphragm 24, backstop 27 and backstop frame 28, also have bottom electrode 29, top electrode 30 in addition, vibrating diaphragm 24 edges and substrate 21 constitute capacitance structure.Its characteristics be vibrating diaphragm 24 last, overarm 25 under the monofilm structure, be that upper and lower surface is inverted with the structure of the vibrating diaphragm among the embodiment one 24 with overarm 25, make overarm 25 be in the below of vibrating diaphragm 24.Simultaneously, will be at the through hole periphery at backstop frame 28 centers, most the anti-concussion of the dentation that level puts in hole backstops 27 that evenly are provided with are removed, and support in backstop on the perforation recess channels 36 of four jiaos of through holes at 23 centers and backstop frame 28 centers, most the anti-concussion of strip backstops 27 are set, backstop 27 two ends and backstop frame 28 are connected, and are positioned at the top of overarm 25.Prevent concussion backstop 27 and hang oneself from a beam that the space is arranged between 25.
Vibrating diaphragm 24 supports 22 by overarm 25 with overarm frame 26, overarm and links to each other.Overarm 25 can be multiple shape, is example here with the straight beam, and overarm 25 is made up of four straight beams, and an end and vibrating diaphragm 24 lower surfaces of straight beam are fixed; The other end links to each other with overarm frame 26, and overarm frame 26 is fixed with the upper surface of overarm support 22, in order to reduce parasitic capacitance, and the area of the frame 26 that reduces to hang oneself from a beam.Overarm 25 and overarm frame 26 are selected electric conducting material for use, can be polysilicons, by mixing phosphorus or boron, form n type or p type conductive layer.Spacing between overarm 25 and the substrate 21 is the 1-2 micron.
Vibrating diaphragm 24 and overarm 25 conductions are fixed, and vibrating diaphragm 24, is realized by technology with interior zone at the overarm tie point, thickeies, and when guaranteeing overarm 25 vibrations, vibrating diaphragm 24 keeps favorable rigidity.In vibrating diaphragm 24 marginal portions a plurality of apertures 32 are arranged, aperture 32 is positioned at the zone beyond back of the body chamber 31 upper sheds.The effect of aperture 32 is to improve Frequency Response when vibrating diaphragm 24 vibration, also can be used as corrosion vibrating diaphragm 24 edges simultaneously and hang oneself from a beam 25, the sacrifice hole of original sacrifice layer between the substrate 21.Vibrating diaphragm 24 can be selected polysilicon for use, by mixing phosphorus or boron, forms n type or p type conductive layer, as a battery lead plate of electric capacity.Vibrating diaphragm 24 and the spacing of hanging oneself from a beam between 25 are the 1-2 micron.
When chip is subjected to time spent of doing of acoustic pressure, vibrating diaphragm 24 passes to overarm 25 to the power that are subjected to, and overarm 25 produces distortion, because distortion mainly concentrates in the overarm 25, the in the vertical direction of vibrating diaphragm 24 almost keeps translation.The translation displacement of vibrating diaphragm 24 converts the variation of capacitance to, thereby realizes the function of transducer.
Claims (16)
1. a single membrane capacitance type microphone chip is semiconductor microphone chip, comprises substrate, overarm support, backstop support, vibrating diaphragm, overarm, backstop frame, overarm frame and upper and lower electrode;
Wherein, there is a through hole at the substrate center, is back of the body chamber, and upper surface of substrate is fixed with frame shape backstop and supports, and backstop supports upper surface and is fixed with frame shape backstop frame, and the backstop centre of support is similar with the through hole at backstop frame center, and the aperture is suitable for reading greater than back of the body chamber;
Through hole periphery at backstop centre of support and backstop frame center is provided with the perforation groove, supports and a side of backstop frame has through hole in backstop, and the interior upper surface of substrate of through hole is provided with bottom electrode;
Vibrating diaphragm is overlying on the back of the body chamber, is positioned at the center through hole that backstop supports, and there is plurality of small holes the vibrating diaphragm marginal portion, and the end conduction of central part and overarm is fixed; The other end of overarm has the overarm frame, and the overarm frame is positioned at the perforation groove of backstop centre of support through hole periphery, and its upper surface is installed with top electrode, and lower surface links to each other with overarm supports insulative formula, and overarm is supported the lower surface insulation and is fixed in the substrate;
It is characterized in that:
The overarm frame of vibrating diaphragm by overarm and overarm supports upper surface with overarm and links to each other, forms overarm, vibrating diaphragm not at conplane three-dimensional vibrational structure, for vibrating diaphragm under hanging oneself from a beam;
Vibrating diaphragm, overarm and overarm frame are conductive layer or the composite bed that comprises conductive layer;
The vibrating diaphragm center is relative up and down with back of the body upper shed center, chamber, and vibrating diaphragm is greater than back of the body chamber upper shed area, and the plurality of small holes of vibrating diaphragm marginal portion is in back of the body chamber upper shed zone in addition;
The backstop frame is provided with backstop, be the through hole periphery at backstop frame center, evenly be provided with most the anti-concussion of the dentation that level puts in hole backstops, backstop is positioned at the plurality of small holes top of vibrating diaphragm marginal portion, it is projected in the vibrating diaphragm marginal portion, and the space is arranged between the vibrating diaphragm.
2. single membrane capacitance type microphone chip as claimed in claim 1 is characterized in that: described substrate is that resistivity is less than 10
-2The Semiconducting Silicon Materials of Ω .cm.
3. single membrane capacitance type microphone chip as claimed in claim 1 is characterized in that: described overarm support and backstop are supported for insulating material.
4. single membrane capacitance type microphone chip as claimed in claim 3 is characterized in that: described insulating material is a silica, is LTO, PSG, TEOS.
5. single membrane capacitance type microphone chip as claimed in claim 1 is characterized in that: described vibrating diaphragm, overarm, overarm frame are the polysilicon of mixing phosphorus or boron-doping.
6. single membrane capacitance type microphone chip as claimed in claim 1 is characterized in that: described overarm is the strip straight beam.
7, single membrane capacitance type microphone chip as claimed in claim 1 is characterized in that: on the described vibrating diaphragm, vibrating diaphragm and the thickness of overarm tie point with interior zone are greater than vibrating diaphragm and overarm tie point zone in addition.
8, single membrane capacitance type microphone chip as claimed in claim 1 is characterized in that: the spacing between described vibrating diaphragm and the overarm is the 1-2 micron.
9. a single membrane capacitance type microphone chip is semiconductor microphone chip, comprises substrate, overarm support, backstop support, vibrating diaphragm, overarm, backstop frame, overarm frame and upper and lower electrode;
Wherein, there is a through hole at the substrate center, is back of the body chamber, and upper surface of substrate is fixed with frame shape backstop and supports, and backstop supports upper surface and is fixed with frame shape backstop frame, and the backstop centre of support is similar with the through hole at backstop frame center, and the aperture is suitable for reading greater than back of the body chamber;
Through hole periphery at backstop centre of support and backstop frame center is provided with the perforation groove, supports and a side of backstop frame has through hole in backstop, and the interior upper surface of substrate of through hole is provided with bottom electrode;
Vibrating diaphragm is overlying on the back of the body chamber, is positioned at the center through hole that backstop supports, and there is plurality of small holes the vibrating diaphragm marginal portion, and the end conduction of central part and overarm is fixed; The other end of overarm has the overarm frame, and the overarm frame is positioned at the perforation groove of backstop centre of support through hole periphery, and its upper surface is installed with top electrode, and lower surface links to each other with overarm supports insulative formula, and overarm is supported the lower surface insulation and is fixed in the substrate;
It is characterized in that:
The overarm frame of vibrating diaphragm by overarm and overarm supports upper surface with overarm and links to each other, forms overarm, vibrating diaphragm not at conplane three-dimensional vibrational structure, for vibrating diaphragm on hanging oneself from a beam;
Vibrating diaphragm, overarm and overarm frame are conductive layer or the composite bed that comprises conductive layer;
The vibrating diaphragm center is relative up and down with back of the body upper shed center, chamber, and vibrating diaphragm is greater than back of the body chamber upper shed area, and the plurality of small holes of vibrating diaphragm marginal portion is in back of the body chamber upper shed zone in addition;
The backstop frame is provided with backstop, is on the perforation recess channels of the through hole periphery at backstop centre of support and backstop frame center, and most the anti-concussion of strips backstops are set, and backstop two ends and backstop frame are connected, and are positioned on the overarm, and between hanging oneself from a beam the space are arranged.
10. single membrane capacitance type microphone chip as claimed in claim 9 is characterized in that: described substrate is that resistivity is less than 10
-2The Semiconducting Silicon Materials of Ω .cm.
11. single membrane capacitance type microphone chip as claimed in claim 9 is characterized in that: described overarm support and backstop are supported for insulating material.
12. single membrane capacitance type microphone chip as claimed in claim 11 is characterized in that: described insulating material is a silica, is LTO, PSG, TEOS.
13. single membrane capacitance type microphone chip as claimed in claim 9 is characterized in that: described vibrating diaphragm, overarm, overarm frame are the polysilicon of mixing phosphorus or boron-doping.
14. single membrane capacitance type microphone chip as claimed in claim 9 is characterized in that: described overarm is the strip straight beam.
15, single membrane capacitance type microphone chip as claimed in claim 9 is characterized in that: on the described vibrating diaphragm, vibrating diaphragm and the thickness of overarm tie point with interior zone are greater than vibrating diaphragm and overarm tie point zone in addition.
16, single membrane capacitance type microphone chip as claimed in claim 9 is characterized in that: the spacing between described vibrating diaphragm and the overarm is the 1-2 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201194081U CN201004713Y (en) | 2006-09-06 | 2006-09-06 | Single film capacitance speaker chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201194081U CN201004713Y (en) | 2006-09-06 | 2006-09-06 | Single film capacitance speaker chip |
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| CN201004713Y true CN201004713Y (en) | 2008-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2006201194081U Expired - Fee Related CN201004713Y (en) | 2006-09-06 | 2006-09-06 | Single film capacitance speaker chip |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102264020A (en) * | 2010-05-26 | 2011-11-30 | 国立清华大学 | Micro-Electro-Mechanical condenser microphone |
| CN102457800A (en) * | 2010-10-21 | 2012-05-16 | 北京卓锐微技术有限公司 | MEMS (Micro Electronic Mechanical System) capacitive microphone without back polar plate and manufacture method thereof |
-
2006
- 2006-09-06 CN CNU2006201194081U patent/CN201004713Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102264020A (en) * | 2010-05-26 | 2011-11-30 | 国立清华大学 | Micro-Electro-Mechanical condenser microphone |
| CN102264020B (en) * | 2010-05-26 | 2013-12-25 | 国立清华大学 | Micro-Electro-Mechanical condenser microphone |
| CN102457800A (en) * | 2010-10-21 | 2012-05-16 | 北京卓锐微技术有限公司 | MEMS (Micro Electronic Mechanical System) capacitive microphone without back polar plate and manufacture method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080109 Termination date: 20120906 |