CN108231996B - Foil resistance force-sensing sensor and preparation method thereof - Google Patents

Foil resistance force-sensing sensor and preparation method thereof Download PDF

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Publication number
CN108231996B
CN108231996B CN201810122660.5A CN201810122660A CN108231996B CN 108231996 B CN108231996 B CN 108231996B CN 201810122660 A CN201810122660 A CN 201810122660A CN 108231996 B CN108231996 B CN 108231996B
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foil
polyimide film
piece
fixture
raw material
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CN108231996A (en
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邵明华
危彩良
柳志波
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Guangdong Micro-Strain Sensing Technology Co Ltd
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Guangdong Micro-Strain Sensing Technology Co Ltd
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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10NELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00Piezoelectric or electrostrictive devices
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10NELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00Piezoelectric or electrostrictive devices
    • H10N30/01Manufacture or treatment
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10NELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00Piezoelectric or electrostrictive devices
    • H10N30/704Piezoelectric or electrostrictive devices based on piezoelectric or electrostrictive films or coatings

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a kind of foil resistance force-sensing sensors and preparation method thereof, the pressure sensor includes the first polyimide film, route foil with resistance value, foil piece without resistance value, second polyimide film and metal terminal, route foil includes peripheral foil line and horizontally-arranged foil line, route foil is connected to the inner surface of the first polyimide film, foil piece is connected to the inner surface of the second polyimide film, when the inner surface edge of the inner surface edge of the second polyimide film and the first polyimide film is bonded together by adhesive glue, clearance space is equipped between route foil and foil piece, metal terminal be riveted on the extension end the PIN position of the first polyimide film and be connected respectively with the both ends of peripheral foil line.The good linearity of weight and change in resistance of the invention, is not in the case where resistance value declines to a great extent suddenly, and stability is high, and foil is not easy to break, and using polyimide film as basilar memebrane, temperature tolerance with higher, when welding will not be burnt out.

Description

Foil resistance force-sensing sensor and preparation method thereof
Technical field
The present invention relates to pressure sensor technique fields, are to be related to a kind of foil resistance force-sensing sensor more specifically And preparation method thereof.
Background technique
Tested dynamic pressure acts on elastic sensing element, is deformed it, is pasted at the position of its deformation Resistance strain gage (such as: wire form foil gauge, foil gage), resistance strain gage experiences the variation of dynamic pressure, by this principle The scales of design are resistance pressure transmitter.
Existing resistance pressure transmitter has the disadvantage that 1, foil route is to be printed on basilar memebrane by mode of printing On, although production cost is low, easy fracture is of poor quality;2, the temperature tolerance of basilar memebrane is poor, when welding, passes from metal terminal The heat passed is easy to burn out basilar memebrane;3, weight and change in resistance is linear bad, resistance value can occur suddenly substantially under Drop, stability do not reach requirement.
Summary of the invention
It is an object of the invention to overcome drawbacks described above in the prior art, provide a kind of foil resistance force-sensing sensor and Preparation method.
To achieve the above object, the first aspect of the present invention provides a kind of foil resistance force-sensing sensor, including first Polyimide film, the route foil with resistance value, the foil piece without resistance value, the second polyimide film and two metal terminals, institute The inner surface that route foil is connected to the first polyimide film is stated, the route foil includes that peripheral foil line and several are horizontally-arranged Foil line, the periphery foil line are centered around the periphery of horizontally-arranged foil line, and the head and the tail both ends of the periphery foil line are extend side by side To the extension end the PIN position of the first polyimide film, the head and the tail both ends of the horizontally-arranged foil line are connected with peripheral foil line respectively It connects, is arranged at equal intervals between adjacent two horizontally-arranged foil lines, the foil piece is connected to the inner surface of the second polyimide film, institute The adhesive glue for being equipped at the inner surface edge of the second polyimide film and being arranged in foil piece periphery is stated, the height of the adhesive glue is big In the height of foil piece, when the inner surface edge of second polyimide film and the inner surface edge of the first polyimide film are logical When crossing adhesive glue and bonding together, clearance space is equipped between the route foil and foil piece, two metal terminals are riveted on The extension end the PIN position of first polyimide film is simultaneously connected with the head and the tail both ends of peripheral foil line respectively.
Preferably, the route foil and foil piece are made of constantan foil respectively.
Preferably, it is oblong, institute that the periphery foil line, which is centered around the shape formed when horizontally-arranged foil line periphery, State the foil piece that foil piece is set as oblong.
The second aspect of the present invention provides a kind of preparation method of foil resistance force-sensing sensor, comprising the following steps:
First polyimide film is laminated and is heated with the first foil raw material for preparing route foil, the two is connected Together, photoetching, exposure, development, corrosion successively are carried out to the first foil raw material later, made needed for being formed on the first foil raw material Line pattern, be made with route foil the first polyimide film;
Both second polyimide film and the second foil raw material of the preparation without resistance value foil piece are laminated and are heated, make It links together, photoetching, exposure, development, corrosion successively is carried out to the second foil raw material later, the second foil raw material is made to form institute The second polyimide film with no resistance value foil piece is made in the shape needed;
The adhesive glue for being arranged in foil piece periphery is coated at the inner surface edge of the second polyimide film, makes adhesive glue Height is greater than the height of foil piece, and by the inner surface side of the inner surface edge of the second polyimide film and the first polyimide film Edge is bonded together by adhesive glue alignment;
Two metal terminals are riveted on to the extension end the PIN position of the first polyimide film, and make its respectively with peripheral foil The head and the tail both ends of material line are connected.
Preferably, pressure is set as 650~700Kg in lamination and heating stepses, heating temperature is 160~170 DEG C, room temperature taking-up is cooled to after keeping the temperature 2 hours.
Preferably, being painted respectively on the surface of the first foil raw material and the second foil raw material in lithography step It is toasted after one layer photoresist, rises to 100 DEG C from room temperature, heat preservation 18~be cooled to room temperature after twenty minutes.
Preferably, the time for exposure is 18~20 seconds, the developing time is 18~22 seconds, after having developed It rinses, drying.
Preferably, the etching time is 10~22 seconds, is neutralized, cleaned after corrosion, spin-drying.
Preferably, first polyimide film and preparing the first of route foil in lamination and heating stepses Foil raw material, the second foil raw material of the second polyimide film and preparation without resistance value foil piece are individually positioned in corresponding folder It in tool, and is laminated by press machine compressing fixture, all locks in fixture is tightened by spanner after press machine compressing fixture Gu nut, stills remain in identical pressure state after removing fixture from press machine, finally remove fixture be transferred in baking oven into Row heating.
Preferably, the fixture includes clamp bottom board, polytetrafluoro film, silicon rubber, fixture glass plate, fixture top Plate, for the screw bolt and nut of locking fixture bottom plate and fixture top plate, the fixture assemble method are as follows: put two on clamp bottom board Strata polytetrafluoroethylene membrane, then one piece of silicon rubber is put, then put two layers of polytetrafluoro film, then put first polyimide film and the first foil Material raw material or the second polyimide film and the second foil raw material, then put one piece of two sides and post the fixture glass plate of aluminium foil, then put Another first polyimide film and the first foil raw material or the second polyimide film and the second foil raw material, then put two stratas Polytetrafluoroethylene membrane, then one piece of silicon rubber is put, then put two layers of polytetrafluoro film, according to this sequence, last edition needs are put Two pieces of silicon rubbers are set, then installs fixture top plate, passes through screw bolt and nut locking fixture bottom plate and fixture top plate.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention is equipped with the first polyimide film, the route foil with resistance value, the foil piece without resistance value, the second polyamides Imines film and two metal terminals, reasonable in design, the good linearity of weight and change in resistance are not in that resistance value is suddenly big The case where width declines, stability is high, and foil is not easy to break, with higher resistance to using polyimide film as basilar memebrane Warm nature, when welding, will not burn out basilar memebrane, substantially increase the quality of product.
2, preparation process advantages of simple of the invention, each link can guarantee the performance of pressure sensor, greatly improve The quality of product.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention Some embodiments for those of ordinary skill in the art without creative efforts, can also basis These attached drawings obtain other attached drawings.
Fig. 1 is the sectional view of foil resistance force-sensing sensor provided by the invention;
Fig. 2 is the installation diagram of the first polyimide film provided by the invention, route foil and metal terminal;
Fig. 3 is the installation diagram of foil piece provided by the invention, the second polyimide film and adhesive glue;
Fig. 4 is the installation diagram of the second polyimide film and adhesive glue provided by the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Please refer to figs. 1 to 4, the embodiment provides a kind of foil resistance force-sensing sensor, including first poly- Acid imide film 1, the route foil 2 with resistance value, the foil piece 3 without resistance value, the second polyimide film 4 and two metal terminals 5, Each component part of the present embodiment is described in detail with reference to the accompanying drawing.
Route foil 2 is connected to the inner surface of the first polyimide film 1 by laminar manner, and route foil 2 includes periphery Foil line 21 and several horizontally-arranged foil lines 22, peripheral foil line 21 are centered around the periphery of horizontally-arranged foil line 22, peripheral foil line 21 head and the tail both ends are extend side by side to the extension end the PIN position 11 of the first polyimide film 1, the head and the tail both ends of horizontally-arranged foil line 22 It is connected respectively with peripheral foil line 21, is arranged at equal intervals between adjacent two horizontally-arranged foil lines 22.
Wherein, length, thickness and the quantity of peripheral foil line 21 and horizontally-arranged foil line 22 can determine the electricity of route foil Hinder size.It, certainly according to actual needs can also be with when it is implemented, the resistance value of route foil 2 can be set to 4~20K Ω Carry out adaptive change.
Foil piece 3 is connected to the inner surface of the second polyimide film 4 by laminar manner, the second polyimide film 4 it is interior The adhesive glue 6 for being arranged in 3 periphery of foil piece is equipped at marginal surface, the height of adhesive glue 6 is greater than the height of foil piece 3.
When the inner surface edge of the second polyimide film 4 and the inner surface edge of the first polyimide film 1 pass through adhesive glue 6 When bonding together, since the height of adhesive glue 6 is greater than the height of foil piece 3, formd between route foil 2 and foil piece 3 Clearance space.When foil resistance force-sensing sensor is under pressure, route foil 2 can connect with the force part of foil piece 3 Touching.
Two metal terminals 5 be riveted on the extension end the PIN position 11 of the first polyimide film 1 and respectively with peripheral foil line 21 head and the tail both ends are connected.
In the present embodiment, route foil 2 and foil piece 3 can preferably be made of constantan foil, naturally it is also possible to use Other kinds of foil.Wherein, it can be oval that peripheral foil line 21, which is centered around the shape formed when horizontally-arranged 22 periphery of foil line, Shape, correspondingly, foil piece 3 can be set to the foil piece of oblong.
The preparation method of the foil resistance force-sensing sensor of the present embodiment, comprising the following steps:
(1) the first polyimide film is laminated with the first foil raw material for preparing route foil and is linked together, pressure is set It is set to 650~700Kg, heating temperature is 160~170 DEG C, and room temperature taking-up is cooled to after keeping the temperature 2 hours;After laminating A layer photoresist is painted on the surface of one foil raw material, is toasted after gluing, is risen to 100 DEG C from room temperature, is kept the temperature 18~20 points It is cooled to room temperature after clock;Mask plate with line pattern is adjacent to the first foil raw material, is sent into exposure in exposure machine, when exposure Between be 18~20 seconds;The the first foil raw material exposed to be put into developing machine and is developed, developing time is 18~22 seconds, It is rinsed after having developed, drying;The first foil raw material that development has dried is put into etching machine and is corroded, etching time is 10~22 seconds, makes to form required line pattern (as shown in Figure 2) on the first foil raw material, neutralized, cleaned, got rid of after corrosion The first polyimide film with route foil is made in dry-cure;
(2) the second foil raw material lamination by the second polyimide film with preparation without resistance value foil piece links together, and presses Power is set as 650~700Kg, and heating temperature is 160~170 DEG C, and room temperature taking-up is cooled to after keeping the temperature 2 hours;After laminating The second foil raw material surface on paint a layer photoresist, toasted after gluing, rise to 100 DEG C from room temperature, heat preservation 18~ It is cooled to room temperature after twenty minutes;Mask plate compatible with shape needed for foil piece is adjacent to the second foil raw material, is sent into exposure Exposure in machine, time for exposure are 18~20 seconds;The the second foil raw material exposed is put into developing machine and is developed, is developed Time is 18~22 seconds, is rinsed after having developed, drying;The the second foil raw material to have developed is put into etching machine and carries out corruption Erosion, etching time are 10~22 seconds, and the second foil raw material is made to form required shape (as shown in Figure 3), neutralized after corrosion, The second polyimide film with no resistance value foil piece is made in cleaning, spin-drying;
(3) adhesive glue for being arranged in foil piece periphery is coated at the inner surface edge of the second polyimide film, makes to bond The height of glue is greater than the height of foil piece, and by the interior table of the inner surface edge of the second polyimide film and the first polyimide film Face edge is bonded together by adhesive glue alignment;
(4) two metal terminals are riveted on to the extension end the PIN position of the first polyimide film, and make its respectively with periphery The head and the tail both ends of foil line are connected.
Preferably, lamination and heating stepses in, the first polyimide film with prepare route foil the first foil raw material, The the second foil raw material of second polyimide film and preparation without resistance value foil piece can be individually positioned in corresponding fixture, And be laminated by press machine compressing fixture, all locking spiral shells in fixture are tightened by spanner after press machine compressing fixture Mother, stills remain in identical pressure state after removing fixture from press machine, finally remove fixture and be transferred in baking oven and consolidated Change heating.
Wherein, fixture may include clamp bottom board, polytetrafluoro film, silicon rubber, fixture glass plate, fixture top plate, be used for The screw bolt and nut of locking fixture bottom plate and fixture top plate.
Fixture assemble method are as follows: put two layers of polytetrafluoro film on clamp bottom board, then put one piece of silicon rubber, then put two stratas Polytetrafluoroethylene membrane, then put first polyimide film and the first foil raw material or the second polyimide film and the second foil original Material, then puts one piece of two sides and posts the fixture glass plate of aluminium foil, then put another first polyimide film and the first foil raw material or The second polyimide film of person and the second foil raw material, then two layers of polytetrafluoro film is put, then put one piece of silicon rubber, then put two stratas four Fluorine film, according to this sequence, last version needs to place two pieces of silicon rubbers, and then installs fixture top plate, passes through spiral shell Screw bolt and nut locking fixture bottom plate and fixture top plate.
By the lamination of above-mentioned fixture and baking oven heating means, it is put into when baking oven is heating and curing and still maintains when entire fixture In identical pressure state, it can make to be laminated material mean forced, avoid the occurrence of and material is placed on layer in traditional handicraft In press together lamination heating when because of bad problem caused by unbalance stress.It certainly, can also be directly in layer in order to simplify step Press is laminated and is heated.
It should be noted that above-mentioned each control parameter can be changed according to actual needs, non-the present embodiment It is limited.
In conclusion of the invention is reasonable in design, the good linearity of weight and change in resistance, be not in resistance value suddenly The case where declining to a great extent, stability is high, and foil is not easy to break, with higher using polyimide film as basilar memebrane Temperature tolerance, the heat that metal terminal passes over when welding will not burn out the extension end the PIN position of the first polyimide film, significantly Improve the quality of product.In addition, preparation process advantages of simple of the invention, each link can guarantee the property of pressure sensor Energy.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention, It should be equivalent substitute mode, be included within the scope of the present invention.

Claims (8)

1. a kind of foil resistance force-sensing sensor, which is characterized in that including the first polyimide film (1), with the route of resistance value Foil (2), the foil piece (3) without resistance value, the second polyimide film (4) and two metal terminals (5), the route foil (2) It is connected to the inner surface of the first polyimide film (1), the route foil (2) includes that peripheral foil line (21) and several are horizontally-arranged Foil line (22), the periphery foil line (21) are centered around the periphery of horizontally-arranged foil line (22), the periphery foil line (21) Head and the tail both ends are extend side by side to the extension end the PIN position (11) of the first polyimide film (1), the head of the horizontally-arranged foil line (22) Tail both ends are connected with peripheral foil line (21) respectively, are arranged at equal intervals between adjacent two horizontally-arranged foil lines (22), the foil Material piece (3) is connected to the inner surface of the second polyimide film (4), sets at the inner surface edge of second polyimide film (4) There is the adhesive glue (6) for being arranged in foil piece (3) periphery, the height of the adhesive glue (6) is greater than the height of foil piece (3), works as institute The inner surface edge of the inner surface edge and the first polyimide film (1) of stating the second polyimide film (4) is viscous by adhesive glue (6) When being connected together, clearance space is equipped between the route foil (2) and foil piece (3), two metal terminals (5) are riveted on the The extension end the PIN position (11) of one polyimide film (1) is simultaneously connected with the head and the tail both ends of peripheral foil line (21) respectively, In, the route foil (2) and foil piece (3) are made of constantan foil respectively.
2. foil resistance force-sensing sensor according to claim 1, which is characterized in that the periphery foil line (21) surrounds The shape formed when horizontally-arranged foil line (22) is peripheral is oblong, and the foil piece (3) is set as the foil piece of oblong.
3. the preparation method of foil resistance force-sensing sensor, feature described according to claim 1~any one of 2 exist In, comprising the following steps:
First polyimide film is laminated and is heated with the first foil raw material for preparing route foil, the two is made to be connected to one It rises, photoetching, exposure, development, corrosion successively is carried out to the first foil raw material later, make to form required line on the first foil raw material The first polyimide film with route foil is made in road pattern;
By the second polyimide film and preparation, the second foil raw material without resistance value foil piece is laminated and is heated, and connects the two Together, photoetching, exposure, development, corrosion successively are carried out to the second foil raw material later, forms the second foil raw material required The second polyimide film with no resistance value foil piece is made in shape;
The adhesive glue for being arranged in foil piece periphery is coated at the inner surface edge of the second polyimide film, makes the height of adhesive glue Lead to greater than the height of foil piece, and by the inner surface edge of the second polyimide film and the inner surface edge of the first polyimide film Adhesive glue alignment is crossed to bond together;
Two metal terminals are riveted on to the extension end the PIN position of the first polyimide film, and make its respectively with peripheral foil line Head and the tail both ends be connected.
4. the preparation method of foil resistance force-sensing sensor according to claim 3, which is characterized in that in lithography step In, it is toasted after painting a layer photoresist respectively on the surface of the first foil raw material and the second foil raw material, from room temperature liter To 100 DEG C, heat preservation 18~be cooled to room temperature after twenty minutes.
5. the preparation method of foil resistance force-sensing sensor according to claim 3, it is characterised in that: the time for exposure It is 18~20 seconds, the developing time is 18~22 seconds, is rinsed after having developed, drying.
6. the preparation method of foil resistance force-sensing sensor according to claim 3, it is characterised in that: the etching time It is 10~22 seconds, is neutralized, cleaned after corrosion, spin-drying.
7. the preparation method of foil resistance force-sensing sensor according to claim 3, which is characterized in that be laminated and heating In step, first polyimide film and the first foil raw material, the second polyimide film and preparation nothing that prepare route foil Second foil raw material of resistance value foil piece is individually positioned in corresponding fixture, and carries out layer by press machine compressing fixture Pressure tightens all lock screws in fixture by spanner after press machine compressing fixture, make fixture from press machine remove after still It is maintained at identical pressure state, fixture is finally removed and is transferred in baking oven and heated.
8. the preparation method of foil resistance force-sensing sensor according to claim 7, which is characterized in that the fixture includes Clamp bottom board, polytetrafluoro film, silicon rubber, fixture glass plate, fixture top plate, for the spiral shell of locking fixture bottom plate and fixture top plate Screw bolt and nut, the fixture assemble method are as follows: put two layers of polytetrafluoro film on clamp bottom board, then put one piece of silicon rubber, then put Two layers of polytetrafluoro film, then put first polyimide film and the first foil raw material or the second polyimide film and the second foil Material raw material, then put one piece of two sides and post the fixture glass plate of aluminium foil, then put another first polyimide film and the first foil original Material or the second polyimide film and the second foil raw material, then two layers of polytetrafluoro film is put, then put one piece of silicon rubber, then put two layers Polytetrafluoro film, according to this sequence, last version needs to place two pieces of silicon rubbers, then installs fixture top plate, leads to Cross screw bolt and nut locking fixture bottom plate and fixture top plate.
CN201810122660.5A 2018-02-07 2018-02-07 Foil resistance force-sensing sensor and preparation method thereof Active CN108231996B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475804A1 (en) * 1980-02-12 1981-08-14 Lewiner Jacques IMPROVEMENTS ON COMPOSITE SHEETS CONSTITUTING ELECTROMECHANICAL TRANSDUCERS AND TRANSDUCERS EQUIPPED WITH SUCH SHEETS
CN101490642A (en) * 2006-07-18 2009-07-22 Iee国际电子工程股份公司 Input device
CN105092114A (en) * 2015-04-28 2015-11-25 深圳市豪恩声学股份有限公司 Pressure sensor, intelligent shoe pad, intelligent shoe, and manufacturing method of pressure sensor
CN205209473U (en) * 2015-10-26 2016-05-04 范红中 Even foil strain gauge of thickness
CN107246930A (en) * 2017-06-20 2017-10-13 深圳市力合鑫源智能技术有限公司 A kind of thin film flexible force-sensing sensor

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