Source: https://patents.google.com/patent/CN105046190B/en
Timestamp: 2020-07-09 12:05:52
Document Index: 536222070

Matched Legal Cases: ['arts 122', 'arts 122', 'arts 122', 'arts 122', 'arts 122', 'arts 122', 'arts 122', 'arts 223', 'arts 223', 'arts 223', 'arts 223', 'art 223', 'art 2111', 'arts 223', 'arts 322', 'arts 422', 'art.\n2', 'arts 3']

CN105046190B - Fingerprint recognition module - Google Patents
Fingerprint recognition module Download PDF
CN105046190B
CN105046190B CN201510233087.1A CN201510233087A CN105046190B CN 105046190 B CN105046190 B CN 105046190B CN 201510233087 A CN201510233087 A CN 201510233087A CN 105046190 B CN105046190 B CN 105046190B
CN105046190A (en
Present invention is disclosed a kind of fingerprint recognition module, fingerprint recognition module includes：Electricity mechanism is used for a point mechanics mechanism for conductive mechanism pressure with electricity mechanism periphery is arranged on；Mechanics mechanism includes upper cover plate and the power conducting parts of middle part hollow out, and upper cover plate is arranged at the top of power conducting parts and collectively constitutes a receiving space with power conducting parts；Electricity mechanism includes circuit board and fingerprint recognition chip, and circuit board includes extension and connecting portion, and fingerprint recognition chip is arranged in receiving space, and is electrically connected with by conductive material and connecting portion；The top end face of fingerprint recognition chip is fixedly connected with the bottom end face of upper cover plate, and the level height of connecting portion bottom end face is higher than the level height of mechanics mechanism bottom end face.Compared to prior art, fingerprint recognition module of the invention, disperse the pressure suffered by electricity mechanism using mechanics mechanism, electricity mechanism can be played a protective role in use, the service life of fingerprint recognition module can be obviously improved.
The present invention relates to the manufacture of fingerprint recognition module and encapsulation technology field.
Because fingerprint has the characteristics such as unchangeable property, uniqueness, therefore, by identifying that fingerprint can accurately and reliably be known Other user identity.Fingerprint recognition module is exactly to use fingerprint identification technology, fingerprint image that is convenient, rapidly obtaining user, is entered And to device that the identity of user is identified.
Fingerprint recognition module disclosed in prior art includes electricity mechanism（Electricity mechanism includes fingerprint recognition chip and electricity Road plate）, but independent mechanics mechanism is not provided with, directly electricity mechanism is fixed between upper cover plate and lower cover during manufacture, Fixed respectively with upper and lower cover plates due to the upper and lower end face of electricity mechanism and contact connection, in use, user's finger presses fingerprint recognition The power that module is applied all is directly delivered in electricity mechanism, easily causes the mechanical failure of electricity mechanism, or causes electricity The conductive materials learned between all parts of mechanism release, and then cause loose contact, and above-mentioned failure can all directly influence finger Line identifies the service life of module.
In view of the above-mentioned problems, also there are some existing settling modes in fingerprint recognition module manufacturer, such as：Apple Inc. Using way is avoided, scolding tin is not done in fingerprint recognition chip back, but be connected from chip sides wiring with circuit board, it is this to set Meter causes fingerprint recognition module manufacturing cost high, and yields is low；The way that fingerprint module uses used by Huawei Mate7 To pad one layer of foam in fingerprint recognition beneath chips and expand the solder area of chip back as far as possible, but both ways not this Matter improves the compression resistance of chip, so fingerprint module is placed in the mobile phone back side being seldom pressurized by Huawei, simultaneously as size is larger, Be not suitable for the industrial design of small-medium size mobile phone.
It is an object of the invention to provide a kind of small volume and long-lived fingerprint recognition module.
For achieving the above object, the present invention adopts the following technical scheme that：
A kind of fingerprint recognition module, the fingerprint recognition module include：
Electricity mechanism is used for point mechanics machine for leading electricity mechanism pressure with the electricity mechanism periphery is arranged on Structure.
The mechanics mechanism includes upper cover plate and the power conducting parts of middle part hollow out, and the upper cover plate is arranged at the power and passed Lead component top and collectively constitute a receiving space with the power conducting parts.
The electricity mechanism includes circuit board and fingerprint recognition chip, and the circuit board includes extension and connecting portion, institute State fingerprint recognition chip to be arranged in the receiving space, and be electrically connected with by conductive material and the connecting portion；The fingerprint The top end face of identification chip is fixedly connected with the bottom end face of the upper cover plate, the level height of the connecting portion bottom end face Higher than the level height of the mechanics mechanism bottom end face.
As further improved technical scheme of the present invention：The inwall of hollow part is provided with branch in the middle part of the power conducting parts Brace, the top end face of the support arm and the power conducting parts form a step, the receiving space are divided into close to institute State the first resettlement section of end face and the second resettlement section of the close power conducting parts bottom end face, institute at the top of power conducting parts State upper cover plate to be arranged in first resettlement section, the fingerprint recognition chip and the connecting portion are arranged on described second and housed In portion, the bottom end face of the upper cover plate is fixedly connected with the upper surface of the support arm.
As further improved technical scheme of the present invention：The receiving space bottom opening, in the power conducting parts The inwall of portion's hollow part is provided with support arm, and the mechanics mechanism also includes lower cover, the bottom end face of the upper cover plate and institute The upper surface for stating support arm is fixedly connected, and the top end face of the lower cover is fixedly connected with the lower surface of the support arm, institute State and leave space between connecting portion and the lower cover.
As further improved technical scheme of the present invention：The top end face of the support arm and the power conducting parts and Bottom end face forms a step respectively, and the receiving space is divided into and compares the support arm closer to the power conducting parts top First resettlement section of end surface and the support arm is compared closer to the 3rd resettlement section of the power conducting parts bottom end face, And the second resettlement section between first resettlement section and the 3rd resettlement section, the upper cover plate are arranged at described In one resettlement section, the lower cover is arranged in the 3rd resettlement section, and the fingerprint recognition chip and the connecting portion are set In second resettlement section, and the upper cover plate and the lower cover close second resettlement section.
As further improved technical scheme of the present invention：The upper cover plate and the power conducting parts are integral type knot Structure.
As further improved technical scheme of the present invention：The mechanics mechanism also includes lower cover, the lower cover Top end face is fixedly connected with the mechanics mechanism bottom end face, and the lower cover closes the receiving space.
As further improved technical scheme of the present invention：The mechanics mechanism also includes stiffening plate, and the stiffening plate is set Put below the circuit board and middle part hollow out, the position of the hollow out and the position of the fingerprint recognition chip back conductive material It is corresponding.
As further improved technical scheme of the present invention：The electricity mechanism also includes substrate, and the substrate is arranged on Between the fingerprint recognition chip and the connecting portion.
As further improved technical scheme of the present invention：The edge of the substrate is extended in the mechanics mechanism.
As further improved technical scheme of the present invention：The edge of the connecting portion of the circuit board extends to the mechanics In mechanism.
Relative to prior art, the technical effects of the invention are that：The fingerprint recognition module of the present invention is outside electricity mechanism Enclose and be provided with mechanics mechanism, user's finger presses applied stress and is distributed to fingerprint recognition mould by mechanics mechanism during use Everywhere, electricity mechanism is solely subjected to a small amount of pressure to group, and leaves space in the bottom of electricity mechanism, and to electricity, mechanism provides elasticity Deformation surplus, touch, electricity mechanism can be played in use with miscellaneous part after preventing electricity mechanism compressive deformation Protective effect, the service life of fingerprint recognition module can be obviously improved.
Fig. 1 is the cross section structure diagram for the fingerprint recognition module that the embodiment of the present invention one is provided；
Fig. 2 is the cross section structure diagram for the fingerprint recognition module that the embodiment of the present invention two is provided；
Fig. 3 is the configuration schematic diagram for the fingerprint recognition module that the embodiment of the present invention two is provided；
Fig. 4 is the cross section structure diagram for the fingerprint recognition module that the embodiment of the present invention three is provided；
Fig. 5 is the cross section structure diagram for the fingerprint recognition module that the embodiment of the present invention four is provided；
Fig. 6 is electricity mechanism and the configuration schematic diagram of stiffening plate in the embodiment of the present invention five；
Fig. 7 be in the embodiment of the present invention five circuit board without departing from the fingerprint in the case of receiving space residing for fingerprint recognition chip Identify module cross section structure diagram；
Fig. 8 is the fingerprint knowledge that circuit board exceeds in the case of receiving space residing for fingerprint recognition chip in the embodiment of the present invention five Other module cross section structure diagram；
Fig. 9 is the fingerprint knowledge that circuit board exceeds in the case of receiving space residing for fingerprint recognition chip in the embodiment of the present invention five Other module cross section structure diagram；
Figure 10 be in the embodiment of the present invention six circuit board and substrate without departing from receiving space feelings residing for fingerprint recognition chip Fingerprint recognition module cross section structure diagram under condition；
Figure 11 is that circuit board exceeds in the embodiment of the present invention six but substrate is without departing from receiving space residing for fingerprint recognition chip In the case of fingerprint recognition module cross section structure diagram；
Figure 12 be in the embodiment of the present invention six circuit board without departing from but substrate exceed receiving space residing for fingerprint recognition chip In the case of fingerprint recognition module cross section structure diagram；
Figure 13 is that circuit board and substrate exceed receiving space situation residing for fingerprint recognition chip in the embodiment of the present invention six Under fingerprint recognition module cross section structure diagram.
Below with reference to embodiment shown in the drawings, the present invention will be described in detail.But these embodiments are simultaneously The present invention is not limited, structure that one of ordinary skill in the art is made according to these embodiments, method or functionally Conversion is all contained in protection scope of the present invention.
Fig. 1 is refer to, Fig. 1 is shown one kind and uses TSV（Through Silicon Via, through-silicon-via）Encapsulation The fingerprint recognition module of technology, TSV encapsulation technologies are prior arts, be will not be repeated here.The fingerprint recognition module includes：
Electricity mechanism 11 leads the pressure of electricity mechanism 11 with the periphery of electricity mechanism 11 is arranged on for dividing Mechanics mechanism 12.
The mechanics mechanism 12 includes the power conducting parts 122 of upper cover plate 121 and middle part hollow out, the upper cover plate 121 with The power conducting parts 122 collectively constitute a receiving space, in the present embodiment, the bottom opening of the receiving space, and even Lead to the middle part of the hollow out.
The electricity mechanism 11 includes circuit board 111 and fingerprint recognition chip 112, and fingerprint recognition chip 112 is used to gather The fingerprint image signal of user, the circuit board 111 include extension（It is not drawn into Fig. 1）Be arranged in the receiving space Connecting portion, the fingerprint recognition chip 112 is arranged in the receiving space, and its signal output pad is located at the back side, and leads to Scolding tin 113 is crossed to be electrically connected with the positive signal input pad of connecting portion.
The inwall of the middle part hollow part of power conducting parts 122 is provided with support arm 1221, the support arm 1221 and institute The top end face for stating power conducting parts 122 forms a step, and the receiving space is divided into and pushed up close to the power conducting parts 122 First resettlement section 14 of end surface and the second resettlement section 15 of the close bottom end face of power conducting parts 122, the upper lid Plate 121 is arranged in first resettlement section, and the fingerprint recognition chip 112 and the connecting portion are arranged on described second and housed In portion, the bottom end face of the upper cover plate 121 is fixedly connected with the upper surface of the support arm 1221 by glue.
It is fixedly connected between the top end face of fingerprint recognition chip 112 and the bottom end face of upper cover plate 121 using glue.Make During, user's finger press applied stress by the dispersive vectoring of mechanics mechanism 12 to fingerprint recognition module everywhere, electricity Mechanism 11 is solely subjected to a small amount of pressure, can reduce the mechanical failure probability of electricity mechanism 11, meanwhile, what electricity mechanism 11 was born Pressure is smaller, and the deformation that it is occurred in use is also smaller, the scolding tin between fingerprint recognition chip 112 and connecting portion 113 are more not easy to release.
The level height of the connecting portion bottom end face is higher than the level height of the bottom end face of power conducting parts 122, Space 13 is namely left in the bottom of connecting portion, the space 13 provides elastic deformation surplus to electricity mechanism 11, prevented Touch, electricity mechanism 11 can be played a protective role in use with miscellaneous part after the compressive deformation of electricity mechanism 11.
The circuit board 111 is preferably flexible print wiring board 111, helps to reduce the integral thickness of electricity mechanism 11, In this way, in the case where fingerprint recognition module thickness is constant, the space 13 of the bottom of electricity mechanism 11 can be designed to bigger.
Fig. 2 to 3 is refer to, Fig. 2, Fig. 3 are shown one kind and use TSV（Through Silicon Via, penetrate silicon and lead to Hole）The fingerprint recognition module of encapsulation technology, TSV encapsulation technologies are prior arts, be will not be repeated here.The fingerprint recognition module Including：
Electricity mechanism 21 leads the pressure of electricity mechanism 21 with the periphery of electricity mechanism 21 is arranged on for dividing Mechanics mechanism 22.
The mechanics mechanism 22 includes the power conducting parts 223 of upper cover plate 221, lower cover 222 and middle part hollow out, the power The inwall of the middle part hollow part of conducting parts 223 is provided with support arm 2231, the support arm 2231 and the power conducting parts 223 Top end face and bottom end face form a step respectively, the receiving space is divided into compare the support arm 2231 closer to First resettlement section 24 of the top end face of power conducting parts 223 and compare the support arm 2231 closer to the power conduct 3rd 26 resettlement section of the bottom end face of part 223, and between first resettlement section 24 and the 3rd resettlement section 26 The second resettlement section 25, the upper cover plate 221 is arranged in first resettlement section 24, and the lower cover 222 is arranged on described 26 in 3rd resettlement section, the fingerprint recognition chip 212 and the connecting portion 2111 are arranged on 25 in second resettlement section, and The upper cover plate 221 and the lower cover 222 close second resettlement section 25.
The bottom end face of the upper cover plate 221 is fixedly connected with the upper surface of the support arm 2231, the lower cover 222 Top end face be fixedly connected with the lower surface of the support arm 2231.
The present embodiment can prevent reversal of stress compared to the increased structure of lower cover 222 of the institute of embodiment one（From the bottom to top Stress）Damage electricity mechanism 21.
The electricity mechanism 21 includes circuit board 211 and fingerprint recognition chip 212, and fingerprint recognition chip 212 is used to gather The fingerprint image signal of user, the circuit board 211 include extension 2112 and the company being arranged in second resettlement section 25 Socket part 2111, the fingerprint recognition chip 212 are arranged in second resettlement section 25, and its signal output pad is located at the back side, And it is electrically connected with by scolding tin 213 and the positive signal input pad of connecting portion 2111.
It is fixedly connected between the top end face of fingerprint recognition chip 212 and the bottom end face of upper cover plate 221 using glue.Make During, user's finger press applied stress by the dispersive vectoring of mechanics mechanism 22 to fingerprint recognition module everywhere, electricity Mechanism 21 is solely subjected to a small amount of pressure, can reduce the mechanical failure probability of electricity mechanism 21, meanwhile, what electricity mechanism 21 was born Pressure is smaller, and the deformation that it is occurred in use is also smaller, the weldering between fingerprint recognition chip 212 and connecting portion 2111 Tin 213 is more not easy to release.
Space 23 is left between the connecting portion 2111 and the lower cover 222, the space 23 carries to electricity mechanism 21 Elastic deformation surplus has been supplied, has been touched after preventing the compressive deformation of electricity mechanism 21 with miscellaneous part, can be in use to electricity Mechanism 21 is learned to play a protective role.
Preferably, fingerprint recognition chip 212 and the connecting portion 2111 not inwall with the middle part hollow part of power conducting parts 223 Contact.
The circuit board 211 is preferably flexible print wiring board 211, helps to reduce the integral thickness of electricity mechanism 21, In this way, in the case where fingerprint recognition module thickness is constant, the void designs of the bottom of electricity mechanism 21 can be obtained bigger.
Fig. 4 is refer to, a kind of fingerprint recognition module using plastic package technology, plastic package technology is shown in Fig. 4 It is prior art, will not be repeated here.The fingerprint recognition module includes：
Electricity mechanism 31 leads the pressure of electricity mechanism 31 with the periphery of electricity mechanism 31 is arranged on for dividing Mechanics mechanism 32.
It is different from the fingerprint recognition module that embodiment one, two is provided, the mechanics mechanism 32 in the present embodiment uses plastics Encapsulation technology manufactures, and the upper cover plate 321 and power conducting parts 322 in mechanics mechanism 32 are integral structures.
The electricity mechanism 31 includes circuit board 311 and the fingerprint recognition chip 312 being arranged on the circuit board 311, Fingerprint recognition chip 312 is used for the fingerprint image signal for gathering user.
Fingerprint recognition chip and connecting portion can contact with the inwall of hollow part in the middle part of power conducting parts, can not also be with power The inwall contact of hollow part, the present embodiment are not limited in the middle part of conducting parts.
Annexation contained by electricity mechanism 31 between the annexation of part and electricity mechanism 31 and mechanics mechanism 32 With embodiment one, two unanimously, ensure that space 33 is left in the bottom of electricity mechanism 31 during manufacture, be vacantly arranged on the institute of mechanics mechanism 32 In the receiving space of formation.
Fig. 5 is refer to, Fig. 5 is shown a kind of fingerprint recognition module using plastic package technology, is different from embodiment The three fingerprint recognition modules provided, the mechanics mechanism 42 in the present embodiment also include lower cover 421, the lower cover 421 Top end face is fixedly connected with the lower surface of the power conducting parts 422 by glue, closes the receiving space.
The present embodiment can prevent reversal of stress compared to the increased structure of lower cover 421 of example IV institute（From the bottom to top Stress）Damage electricity mechanism 41.
Refer to Fig. 6 to 9, the fingerprint recognition module in the present embodiment be equally using manufactured by plastic package technology, Embodiment one, two, three, four is different from, stiffening plate 523 is provided with below the connecting portion of the circuit board of the present embodiment, as circuit board 511 reinforced structure, the middle part of stiffening plate 523 and 512 back side scolding tin of fingerprint recognition chip, 513 corresponding position hollow out, to protect The electricity actuator base that card is electrically connected with leaves space.
Fig. 7 to 9 is refer to, circuit board 511 be able to can also surpass without departing between the collecting residing for fingerprint recognition chip 512 Go out the receiving space residing for fingerprint recognition chip 512, extend in mechanics mechanism 52, the circuit extended in mechanics mechanism 52 The part allowable stress of plate 511 conducts caused strain in the mechanics mechanism 52, and said structure can be according to circuit board 511 flexible in size adjustment, the present embodiment are not limited thereto.
What deserves to be explained is in Fig. 8 and Fig. 9, although circuit board 511 is extended to 52 in mechanics mechanism, pressure can be born, It is due to that this partial circuit plate 511 is not electrically connected with fingerprint recognition chip 512（It is not provided with pad）, it is not even if being pressurized also not The scolding tin 513 between fingerprint recognition chip 512 and circuit board 511 can be caused to release.
Embodiment six refer to Figure 10 to 13, and the fingerprint recognition module in the present embodiment is equally to use plastic package technology Manufactured, embodiment one, two, three, four is different from, stiffening plate is provided with below the connecting portion of the circuit board 612 of the present embodiment 623, and electricity mechanism 61 also includes substrate 613, and substrate 613 is arranged on the connection of fingerprint recognition chip 611 and circuit board 612 Between portion, as electric connecting part.
Circuit board 612 and substrate 613 can be known without departing from that between the collecting residing for fingerprint recognition chip, can also exceed fingerprint Receiving space residing for other chip 611, is extended in mechanics mechanism 62, the He of circuit board 612 extended in mechanics mechanism 62 The part allowable stress of substrate 613 conducts caused strain in the mechanics mechanism 62, and said structure can be according to circuit The flexible in size of plate 612 and substrate 613 is adjusted, and the present embodiment is not limited thereto.
What deserves to be explained is Figure 11 is into Figure 13, although circuit board 612 and/or substrate 613 extend to mechanics mechanism 62 In, pressure can be born, but because this partial circuit plate 612 and/or substrate 613 do not connect electrically with fingerprint recognition chip 611 Connect（It is not provided with pad）, it will not also cause the weldering between fingerprint recognition chip 611 and circuit board 612, substrate 613 even if compression Tin releases.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.
1. a kind of fingerprint recognition module, it is characterised in that the fingerprint recognition module includes：
Electricity mechanism is used for point mechanics mechanism for leading electricity mechanism pressure with the electricity mechanism periphery is arranged on；
The mechanics mechanism includes upper cover plate and the power conducting parts of middle part hollow out, and the upper cover plate is arranged at the power conducting part At the top of part a receiving space is collectively constituted with the power conducting parts；
The electricity mechanism includes circuit board and fingerprint recognition chip, and the circuit board includes extension and connecting portion, the finger Line identification chip is arranged in the receiving space, and is electrically connected with by conductive material and the connecting portion；The fingerprint recognition The top end face of chip is fixedly connected with the bottom end face of the upper cover plate, and space is left in the connecting portion bottom, gives electricity machine Structure provides elastic deformation surplus, is touched after preventing electricity mechanism compressive deformation with miscellaneous part.
2. fingerprint recognition module according to claim 1, it is characterised in that hollow part is interior in the middle part of the power conducting parts Wall is provided with support arm, and the top end face of the support arm and the power conducting parts forms a step, by the receiving space It is divided at the top of the power conducting parts the first resettlement section of end face and the close to the power conducting parts bottom end face Two resettlement sections, the upper cover plate are arranged in first resettlement section, and the fingerprint recognition chip and the connecting portion are arranged on In second resettlement section, the bottom end face of the upper cover plate is fixedly connected with the upper surface of the support arm.
3. fingerprint recognition module according to claim 1, it is characterised in that the receiving space bottom opening, the power The inwall of hollow part is provided with support arm in the middle part of conducting parts, and the mechanics mechanism also includes lower cover, the bottom of the upper cover plate End surface is fixedly connected with the upper surface of the support arm, and the top end face and the lower surface of the support arm of the lower cover are consolidated Fixed connection, space is left between the connecting portion and the lower cover.
4. fingerprint recognition module according to claim 3, it is characterised in that the support arm and the power conducting parts Top end face and bottom end face form a step respectively, and the receiving space is divided into and compares the support arm closer to the power First resettlement section of end face and the support arm is compared closer to the power conducting parts bottom end face at the top of conducting parts 3rd resettlement section, and the second resettlement section between first resettlement section and the 3rd resettlement section, the upper cover plate It is arranged in first resettlement section, the lower cover is arranged in the 3rd resettlement section, the fingerprint recognition chip and institute State connecting portion to be arranged in second resettlement section, and the upper cover plate and the lower cover close second resettlement section.
5. fingerprint recognition module according to claim 1, it is characterised in that the upper cover plate and the power conducting parts are Integral structure.
6. fingerprint recognition module according to claim 5, it is characterised in that the mechanics mechanism also includes lower cover, institute The top end face for stating lower cover is fixedly connected with the mechanics mechanism bottom end face, and the lower cover closes the receiving space.
7. fingerprint recognition module according to claim 5, it is characterised in that the mechanics mechanism also includes stiffening plate, institute State that stiffening plate is arranged on below the circuit board and middle part hollow out, the position of the hollow out are led with the fingerprint recognition chip back The position of electric thing is corresponding.
8. fingerprint recognition module according to claim 7, it is characterised in that the electricity mechanism also includes substrate, described Substrate is arranged between the fingerprint recognition chip and the connecting portion.
9. fingerprint recognition module according to claim 8, it is characterised in that the edge of the substrate extends to the mechanics In mechanism.
10. fingerprint recognition module according to claim 7, it is characterised in that prolong at the edge of the connecting portion of the circuit board Extend in the mechanics mechanism.
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