CN104050484B - Fingerprint Identification sensor, integrated package and electronic device - Google Patents

Fingerprint Identification sensor, integrated package and electronic device Download PDF

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Publication number
CN104050484B
CN104050484B CN201410313038.4A CN201410313038A CN104050484B CN 104050484 B CN104050484 B CN 104050484B CN 201410313038 A CN201410313038 A CN 201410313038A CN 104050484 B CN104050484 B CN 104050484B
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China
Prior art keywords
driving electrodes
electrode
induction electrode
fingerprint
detection element
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CN201410313038.4A
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Chinese (zh)
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CN104050484A (en
Inventor
谭强
丁国栋
蒋亚兵
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Ofilm Microelectronics Technology Co ltd
Nanchang OFilm Tech Co Ltd
Suzhou OFilm Tech Co Ltd
OFilm Group Co Ltd
Guangzhou Delta Imaging Technology Co Ltd
Jiangxi OMS Microelectronics Co Ltd
Original Assignee
OFilm Tech Co Ltd
Nanchang OFilm Tech Co Ltd
Suzhou OFilm Tech Co Ltd
Nanchang OFilm Biometric Identification Technology Co Ltd
OFilm Image Technology Guangzhou Co Ltd
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Application filed by OFilm Tech Co Ltd, Nanchang OFilm Tech Co Ltd, Suzhou OFilm Tech Co Ltd, Nanchang OFilm Biometric Identification Technology Co Ltd, OFilm Image Technology Guangzhou Co Ltd filed Critical OFilm Tech Co Ltd
Priority to CN201410313038.4A priority Critical patent/CN104050484B/en
Publication of CN104050484A publication Critical patent/CN104050484A/en
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Abstract

This application involves fingerprint Identification sensor, integrated package and electronic devices.The integrated package of a kind of touch sensor and fingerprint sensor includes:First flexible and transparent substrate;First embossed layer is formed in the first flexible and transparent substrate, and the first coining layer surface is provided with multiple first grooves and multiple second grooves;First electrode layer is arranged in the multiple first groove;Fingerprint detection element and a plurality of leads being connect with the fingerprint detection element are arranged in the multiple second groove;Second flexible and transparent substrate is arranged on the part of first embossed layer;Second embossed layer is formed in the second flexible and transparent substrate, and the second coining layer surface is provided with multiple third grooves;The second electrode lay is arranged in the multiple third groove, and the first electrode layer and the second electrode lay are for constituting touch sensor.

Description

Fingerprint Identification sensor, integrated package and electronic device
Technical field
This disclosure relates to which fingerprint Identification sensor, senses in particular to a kind of swiping formula (swipe) fingerprint recognition Device, touch sensor and fingerprint sensor integrated package and including the electronics of the fingerprint Identification sensor or the integrated package fill It sets.
Background technology
The certain biological characteristics of human body (such as finger print/palm print) are the unique features of human body, and their complexity energy Enough enough feature quantities provided for discriminating.
The identification technologies such as finger print/palm print fingerprint are current most ripe and cheap biometrics identification technologies.Fingerprint Identification technology is widely used.We are not only it can be seen that the figure of fingerprint identification technology, city in gate inhibition, attendance checking system There is the application of more fingerprint recognitions on field:As laptop, mobile phone, automobile, bank paying all can employing fingerprint identify Technology.In particular with the continuous development of smart mobile phone, will occur largely such as utilizing fingerprint with the relevant demand of fingerprint recognition Identification unlock mobile phone, protection privacy information, guarantee transaction security etc..
Sensor for fingerprint recognition includes resistance sensor, optical sensor and capacitance type sensor etc..
Capacitance type fingerprint identification sensor is typically formed on monocrystalline silicon substrate, therefore is existed when finger force presses Splintering problem occurs.In order to solve the problems, such as silicon chip receive user press many times or it is improper press and it is flimsy, now determine The general silicon substrate using the higher sapphire protection fingerprint sensor of hardness.But sapphire cost is higher, causes entirely to refer to Line identifying system cost is higher.It is generally formed by cmos semiconductor technique using the fingerprint sensor of silicon substrate, this method work Skill is complicated, causes the capacitance type fingerprint identification sensor production cost based on silicon substrate expensive.
Fingerprint Identification sensor is manufactured to need to form certain amount sensing unit on base material such as silicon substrate.If induction is single The lazy weight of member, then the resolution ratio of fingerprint recognition is low, this will lead to not accurately carry out fingerprint recognition or need user more Secondary input fingerprint and keep user experience poor.In addition, the base material area of fingerprint Identification sensor is relatively limited.In limited areal The fingerprint sensor for forming high-resolution is also a technological challenge.
Some fingerprinting schemes, for example, Apple Inc. a scheme, also need increase a drive ring.This drive ring On the one hand it for providing electric field to user's finger, is on the other hand used to be electromagnetically shielded to prevent external electromagnetic field from producing fingerprint recognition Raw interference.This causes entire fingerprint recognition component complicated, increases cost.
It needs a kind of to form sufficient amount sensing unit on limited areal base material or further increase fingerprint recognition The scheme of resolution ratio.
Above- mentioned information is only used for reinforcing the understanding to the background of the disclosure, therefore it disclosed in the background technology part May include the information not constituted to the prior art known to persons of ordinary skill in the art.
Invention content
The application discloses a kind of fingerprint Identification sensor and the electronic device including the fingerprint Identification sensor, can reduce Cost, and sufficient amount driving electrodes can be formed on limited areal base material to improve fingerprint recognition resolution ratio.
Other characteristics and advantages of the disclosure will be apparent from by the following detailed description, or partially by the disclosure Practice and acquistion.
According to one aspect of the disclosure, a kind of integrated package of touch sensor and fingerprint sensor is provided, including:The One flexible and transparent substrate;First embossed layer is formed in the first flexible and transparent substrate, the first coining layer surface setting There are multiple first grooves and multiple second grooves;First electrode layer is arranged in the multiple first groove;Fingerprint detection element And a plurality of leads being connect with the fingerprint detection element, it is arranged in the multiple second groove;Second flexible and transparent substrate, It is arranged on the part of first embossed layer;Second embossed layer is formed in the second flexible and transparent substrate, described second Coining layer surface is provided with multiple third grooves;The second electrode lay is arranged in the multiple third groove, the first electrode Layer and the second electrode lay are for constituting touch sensor, wherein the fingerprint detection element includes:First induction electrode;It is more The first driving electrodes of item, a plurality of first driving electrodes are arranged in parallel and are separated from each other, a plurality of first driving electrodes It is opposite to define multiple first detector gaps at interval with first induction electrode respectively;Second induction electrode, and it is described First induction electrode is parallelly oppositely arranged and positioned at the opposite with a plurality of first driving electrodes of first induction electrode Side;A plurality of second driving electrodes, a plurality of second driving electrodes are arranged in parallel and are separated from each other, and described a plurality of second Driving electrodes are opposite to define multiple second detector gaps at interval with second induction electrode respectively, and described a plurality of second Driving electrodes are arranged in correspondence with a plurality of first driving electrodes in the second electrode and the first induction electrode phase Anti- side.
According to some embodiments, the pitch between pitch and adjacent second driving electrodes between adjacent first driving electrodes Be equal to each other and in 50-60 μ ms, the width of the width of the first driving electrodes and the second driving electrodes be equal to each other and In 20-45 μ ms, the size of the first detector gap and the second detector gap is equal to each other and in 20-40 μ m.
According to some embodiments, the first flexible and transparent substrate and the second flexible and transparent substrate are PET film.
According to some embodiments, first embossed layer and second embossed layer are ultraviolet-curing resin, hot-setting adhesive, light Solid glue or from dry glue.
According to some embodiments, the first electrode layer, the second electrode lay and/or the fingerprint detection element include Conductive grid.
According to another aspect of the present disclosure, a kind of electronic device is provided, including such as aforementioned any one of them integrated package.
According to some embodiments, electronic device further includes transparent cover plate, and the transparent cover plate has top surface, opposite with top surface Bottom surface and connect top and bottom side, the transparent cover plate includes viewing area and non-display area, the integrated package The bottom surface is fitted in by OCA, and bends and fitted in by OCA the non-display area of the side and the top surface, The wherein described fingerprint detection element is located on the top surface, and a plurality of leads extends to the bottom surface from the top surface.
According to some embodiments, the first flexible and transparent substrate than the second flexible and transparent substrate closer to or it is farther From the transparent cover plate.
According to some embodiments, electronic device further includes the protective layer for covering the fingerprint detection element.
According to another aspect of the present disclosure, a kind of fingerprint Identification sensor is provided, including:Substrate;It is formed in substrate Embossed layer, the coining layer surface are provided with multiple grooves;And fingerprint detection element, it is placed in the multiple groove;Wherein The fingerprint detection element includes:First induction electrode;A plurality of first driving electrodes, the parallel cloth of a plurality of first driving electrodes It sets and is separated from each other, a plurality of first driving electrodes are opposite more to define at interval with first induction electrode respectively A first detector gap;Second induction electrode is parallelly oppositely arranged with first induction electrode and feels positioned at described first Answer the side opposite with a plurality of first driving electrodes of electrode;A plurality of second driving electrodes, a plurality of second driving electricity Pole is arranged side by side and is separated from each other, and a plurality of second driving electrodes are opposite at interval with second induction electrode respectively To define multiple second detector gaps, a plurality of second driving electrodes are arranged in correspondence with a plurality of first driving electrodes The side opposite with first induction electrode of the second electrode.
According to some embodiments, the pitch between pitch and adjacent second driving electrodes between adjacent first driving electrodes Be equal to each other and in 50-60 μ ms, the width of the width of the first driving electrodes and the second driving electrodes be equal to each other and In 20-45 μ ms, the size of the first detector gap and the second detector gap is equal to each other and in 20-40 μ m.
According to some embodiments, the fingerprint detection element further includes the first reference electrode and the second reference electrode and a plurality of First illusory driving electrodes and a plurality of second illusory driving electrodes, first reference electrode are parallel with first induction electrode Ground is oppositely arranged and is located at the side opposite with a plurality of first driving electrodes of first induction electrode, second ginseng Electrode is examined parallelly to be oppositely arranged with second induction electrode and positioned at second induction electrode and described a plurality of second The opposite side of driving electrodes, a plurality of first illusory driving electrodes are arranged in parallel and are electrically connected to each other, and described a plurality of first Illusory driving electrodes are arranged in correspondence with a plurality of first driving electrodes in first reference electrode and first sense The side that electrode is opposite, a plurality of second illusory driving electrodes is answered to be arranged in parallel and be electrically connected to each other, described a plurality of second is empty If driving electrodes are arranged in correspondence with a plurality of second driving electrodes in second reference electrode and second induction The opposite side of electrode.
According to some embodiments, the fingerprint detection element includes metallic particles, graphene, carbon nanotube or conductive polymer Sub- material.
According to some embodiments, the fingerprint detection element includes conductive grid.
According to another aspect of the present disclosure, a kind of electronic device is provided, including such as aforementioned any one of them fingerprint recognition Sensor.
According to some embodiments of the disclosure, electrode and lead are formed on non-silicon-based bottom by using embossed layer, it can To improve the reliability of sensor, and the fingerprint sensor of high-resolution can be formed in limited areal at lower cost.Root According to some embodiment of the disclosure, a kind of integrated package of touch sensor and fingerprint sensor is provided, cost can be reduced, Component wear caused by when avoiding forming improves yield rate.
Description of the drawings
Its example embodiment is described in detail by referring to accompanying drawing, the above and other feature and advantage of the disclosure will become It is more obvious.
Fig. 1 schematically shows the fundamental diagram of capacitance type fingerprint detecting element;
Fig. 2 schematically shows the structure chart of the swiping formula fingerprint Identification sensor according to one example embodiment of the disclosure;
Fig. 3 schematically shows the sectional view obtained along the AA ' lines of Fig. 1;
Fig. 4 schematically shows the sectional view obtained along the BB ' lines of Fig. 1;
Fig. 5 schematically shows the conductive grid that can be used for fingerprint detection element;
Fig. 6 schematically shows the structure chart of the swiping formula fingerprint Identification sensor according to one example embodiment of the disclosure;
Fig. 7 shows a plurality of linear fingerprint image obtained when swiping moves above fingerprint Identification sensor when finger;
Fig. 8 shows the complete finger print image that a plurality of linear fingerprint pattern pieces together;
Fig. 9 schematically shows the structural schematic diagram of the fingerprint detection element according to one example embodiment of the disclosure;
Figure 10 schematically shows the structural schematic diagram of the fingerprint detection element according to one example embodiment of the disclosure;
Figure 11 schematically shows the electronic device according to one example embodiment of the disclosure;
Figure 12 is schematically shown according to the collection of the touch sensor of disclosure example embodiment and fingerprint sensor in groups Part;And
Figure 13 schematically shows the electronic device according to disclosure example embodiment, is integrated including shown in Figure 12 Component.
Specific implementation mode
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes Formula is implemented, and is not understood as limited to embodiment set forth herein;On the contrary, thesing embodiments are provided so that the disclosure will Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.In the figure in order to clear It is clear, exaggerate the thickness of region and layer.Identical reference numeral indicates same or similar part in figure, thus will omit it Detailed description.
In addition, described feature, structure or characteristic can be incorporated in one or more implementations in any suitable manner In example.In the following description, many details are provided to fully understand embodiment of the disclosure to provide.However, It will be appreciated by persons skilled in the art that can be with technical solution of the disclosure without one in the specific detail or more It is more, or other methods, constituent element, material may be used etc..In other cases, be not shown in detail or describe known features, Material or operation are to avoid fuzzy all aspects of this disclosure.
The disclosure provides a kind of fingerprint Identification sensor and the electronic device including the fingerprint Identification sensor, can reduce Cost, and sufficient amount driving electrodes can be formed on limited areal base material to improve fingerprint recognition resolution ratio.
Fig. 1 schematically shows the fundamental diagram of capacitance type fingerprint detecting element.
As shown in Figure 1, capacitance type fingerprint detecting element includes fingerprint identification unit, and cover with protective layer 117.Fingerprint is known Other unit may include induction electrode 101 and driving electrodes 103, have a detector gap 107 therebetween.Fingerprint identification unit is It is multiple, and uniline or multirow can be arranged, a fingerprint identification unit is only shown in figure.The induction electrode 101 of fingerprint identification unit A basic capacitor is may make up with driving electrodes 103.
When finger 190 presses above fingerprint identification unit or when swiping, between induction electrode 101 and driving electrodes 103 Capacitive coupling can have different changes above detector gap 107 according to fingerprint ridge 192 or fingerprint valley 194.This be because Dielectric constant for fingerprint ridge is typically 10 to 20 times of air (fingerprint valley).Therefore, fingerprint identification unit compares under fingerprint ridge There is bigger equivalent capacity under fingerprint valley.By detecting the capacitance variations (or voltage change thereon) of fingerprint identification unit, It can be determined that above the unit be fingerprint ridge or fingerprint valley, to obtain fingerprint image.
Fig. 2 schematically shows the structure chart of the swiping formula fingerprint Identification sensor according to one example embodiment of the disclosure. Fig. 3 shows the sectional view that the AA ' lines along Fig. 2 obtain.Fig. 4 shows the sectional view that the BB ' lines along Fig. 2 obtain.
As in Figure 2-4, fingerprint Identification sensor 100 include substrate 111, the embossed layer 113 that is formed in substrate 111 with And it is formed in the fingerprint detection element 110 in embossed layer 113.113 surface of embossed layer is provided with multiple grooves 115, fingerprint detection Element 110 is placed in groove 115.According to example embodiment, fingerprint detection element 110 can be filled up completely groove 115, that is, refer to The upper surface of line detecting element 110 is concordant with the upper surface of embossed layer 113, and but the present disclosure is not limited thereto.
As shown in Fig. 2, fingerprint detection element 110 includes induction electrode 101 and a plurality of driving opposite with induction electrode 101 Electrode 103.A plurality of driving electrodes 103 can be arranged in parallel and be separated from each other.Induction electrode 101 can be with a plurality of driving electrodes 103 It is substantially vertical.A plurality of driving electrodes 103 are spaced apart to define multiple detector gaps 107 respectively with induction electrode 101.Every drive Moving electrode 103 may make up a fingerprint identification unit with induction electrode 101, to induction electrode 101 and 103 structure of a plurality of driving electrodes At multiple fingerprint identification units.
Pitch d between adjacent driven electrode 103 can be equal to each other.The width w1 of driving electrodes 103 can be equal to each other.Sense Answer the width w2 of electrode 101 that can be equal to each other with the width w1 of driving electrodes 103.The size of detector gap 107 can be equal to each other. But the disclosure is not limited.
As shown in Figures 3 and 4, the pitch d between adjacent driven electrode 103 for example can be in 40-60 μ ms.Driving electrodes 103 width w1 for example can be in 20-45 μ ms.The width g of detector gap 107 for example can be in 20-40 μ ms.Detection The width g in gap 107 can be equal to each other.The depth of groove 115 for example can be in 20nm-10 μ ms.The width of induction electrode 101 Spending w2 for example can be in 50-60 μ m.
According to an embodiment, the pitch d between adjacent driven electrode 103 is 50 μm, and the identification for realizing 508PPI is differentiated Rate.
Substrate 111 can be strengthened glass, tempered glass, ceramics, sapphire or PET, PMMA, PC etc..Substrate 111 May be flexible printed circuit board (FPC) substrate, such as BT, FR4, FR5.
Embossed layer 113 may be, for example, as ultraviolet-curing resin, hot-setting adhesive, light binding or from dry glue.
The material of induction electrode 101 and driving electrodes 103 may be the same or different.It forms induction electrode 101 and drives The material of moving electrode 103 can be selected from the one or two of ITO (tin indium oxide) or metal simple-substance particle such as gold, silver, copper, zinc, aluminium Above, metal alloy conductive material, graphene, carbon nano-tube material, nanometer conductive material such as nano silver etc., but the disclosure is unlimited In this.
According to an example embodiment, induction electrode 101 and driving electrodes 103 may include conductive grid 105, such as Fig. 5 institutes Show.At this moment, groove 115 has structure corresponding with conductive grid 105.Using conductive grid, cost is reduced, but still can reach The good result of fingerprint recognition.
Fingerprint Identification sensor 100 may also include lead (not shown), be connect with fingerprint detection element 110, for that will refer to Line detecting element 110 is connected to external circuit, such as fingerprint recognition circuit 109.Lead can be also placed in groove, and can be had Material identical with induction electrode 101 and driving electrodes 103.Lead may also comprise conductive grid.
Fingerprint recognition circuit 109 can sequentially provide drive signal to driving electrodes 103, and can be examined by induction electrode 101 Inductive signal is surveyed, to identify fingerprint.But the present disclosure is not limited thereto.
According to the fingerprint Identification sensor of disclosure embodiment, electrode is formed on non-silicon-based bottom by using embossed layer And lead, the reliability of sensor can be improved, and the fingerprint of high-resolution can be formed in limited areal at lower cost Sensor.
When finger pressing is above the fingerprint Identification sensor with structure as shown in Figure 2, know from the multiple fingerprint Other unit can get the linear fingerprint image of reflection a fingerprint ridge and fingerprint valley.When finger is sliding above fingerprint Identification sensor When wiping mobile, a plurality of linear fingerprint image is can get, as shown in Figure 6.The a plurality of linear fingerprint pattern capable assembling is complete at one Whole fingerprint image, as shown in Figure 7.
The manufacturing method of fingerprint Identification sensor according to disclosure embodiment is described below.
First, prepare substrate 111, such as PET base.Then, embossed layer 113 can be formed in substrate 111.Embossed layer 113 can be ultraviolet-curing resin, hot-setting adhesive, light binding or from dry glue etc..Then, in table of the embossed layer 113 far from substrate 111 Groove 115 is formed by imprint process on face.Groove 115 can be for example latticed according to actual needs.
Then, doctor blade technique can be used to fill such as silver ink in groove 115, and under the conditions of about 150 DEG C Baking sintering, makes the silver-colored simple substance in silver ink sinter conducting electrode patterns into, to form induction electrode 101 and driving electricity Pole 103, and lead is formed as needed.According to an embodiment, silver ink water solid content about 35%, solvent volatilizees in sintering.
Fig. 8 schematically shows the structural schematic diagram of the fingerprint detection element according to another example embodiment of the disclosure.
As shown in figure 8, fingerprint detection element 210 according to the present embodiment and fingerprint detection element 110 shown in Fig. 2 Further include reference electrode 101 ' and illusory driving electrodes 103 ' difference lies in fingerprint detection element 210.
Reference electrode 101 ' can be parallelly oppositely arranged with induction electrode 101, and positioned at induction electrode 101 and a plurality of drive The opposite side of moving electrode 103.
Reference electrode 101 ' is enough to provide noise at least partly to eliminate common-mode noise and post at a distance from driving electrodes 103 Raw coupling reference.In some embodiments, reference electrode 101 ' and induction electrode 101 can have equal length and width, And it can be arranged in parallel.Reference electrode 101 ' can be similar to induction electrode 101 and sense fingerprint ridge/fingerprint valley signal like that, but Its substantial remitted its fury.Reference electrode 101 ' is closely spaced with induction electrode 101 and has similar size, two electricity Pole can generate roughly equal noise and parasitic signal.The noise and parasitic signal of equal coupling can be for example by subtracting two Signal on electrode and be eliminated.
According to some embodiments, induction electrode 101 and reference electrode 101 ' can be coupled to difference by difference filter 123 Amplifier 125.
A plurality of illusory driving electrodes 103 ' parallel arrangement and can be electrically connected to each other, a plurality of illusory driving electrodes 103 ' with A plurality of driving electrodes 103 are arranged in correspondence in the other side of reference electrode 101 ', i.e. the side opposite with induction electrode 101.
Illusory driving electrodes 103 ' are spaced apart with reference electrode 101 ' with gap 107 '.It gap 107 ' can be with 107 phase of gap Together.Illusory driving electrodes 103 ' can be connected to reference potential during fingerprint image senses, such as be grounded.In fingerprint image sense Any instant of time surveyed, one in driving electrodes 103 can be encouraged by drive signal, and remaining driving electrodes 103 It can be coupled to reference potential, such as be grounded.Using the arrangement, noise is coupled substantially equally to induction electrode 101 and reference Electrode 101 ', so as to be eliminated for example, by difference amplifier 125.The circuit arrangement eliminated or reduce noise jamming can root Various modes, the disclosure are taken to be limited not to this according to actual demand.
According to the embodiment, the accuracy of fingerprint recognition can be improved, eliminate the coupling of the fingerprint ridge outside detector gap Close interference.
Fig. 9 schematically shows the structural schematic diagram of the fingerprint detection element according to another example embodiment of the disclosure.
As shown in figure 9, fingerprint detection element 310 according to the present embodiment and fingerprint detection element 110 shown in Fig. 2 Further include the second induction electrode 101 " and a plurality of second driving electrodes 103 " difference lies in fingerprint detection element 310.Second induction Electrode 101 " can be electrically connected with induction electrode 101.
Second induction electrode 101 " is parallel with induction electrode 101 and is set up in parallel, and positioned at induction electrode 101 with it is a plurality of The opposite side of driving electrodes 103.
A plurality of second driving electrodes 103 " are arranged in parallel and are separated from each other.A plurality of second driving electrodes 103 " are respectively with Two induction electrodes 101 " are opposite to define multiple second detector gaps 107 " at interval.A plurality of second driving electrodes 103 " with it is more The first driving electrodes of item 103 are arranged in correspondence with the side opposite with induction electrode 101 of the second induction electrode 101 ".
In the present embodiment, pass through driving electrodes 103, induction electrode 101 and the second driving electrodes 103 ", the second induction Electrode 101 " constitutes a pair of line imaging device, for generating more accurate fingerprint image.By finger first pass through detector gap 107 or 107 " determine the moving direction of finger.In addition, can be become by comparing the signal of induction electrode 101 and the second induction electrode 101 " Change determine finger movement speed (such as:The time for passing through detector gap 107 and 107 " by calculating identical fingerprint portion Difference obtains the movement speed of finger), more accurate fingermark image is obtained with this.
Figure 10 schematically shows the structural schematic diagram of the fingerprint detection element according to another example embodiment of the disclosure.
As shown in Figure 10, fingerprint detection element 410 according to the present embodiment combines Fig. 8 and fingerprint shown in Fig. 9 inspection Survey element.Difference lies in fingerprint detection elements 410 also to wrap with fingerprint detection element 310 shown in Fig. 9 for fingerprint detection element 410 Include two reference electrodes 101 ' and two groups of a plurality of illusory driving electrodes 103 '.Two groups of a plurality of illusory driving electrodes 103 ' can be electric each other Connection.
One reference electrode 101 ' can be parallelly oppositely arranged with induction electrode 101 and positioned at induction electrode 101 with it is more The opposite side of driving electrodes 103.Another reference electrode 101 ' can be parallelly oppositely arranged simultaneously with the second induction electrode 101 " Positioned at the side opposite with a plurality of second driving electrodes 103 " of the second induction electrode 101 ".
One group of a plurality of illusory driving electrodes 103 ' is arranged in parallel and is electrically connected to each other.The a plurality of illusory driving electrodes of the group 103 ' It is arranged in correspondence in the side opposite with induction electrode 101 of reference electrode 101 ' with a plurality of driving electrodes 103.Another group a plurality of Illusory driving electrodes 103 ' are arranged in parallel and are electrically connected to each other.The a plurality of illusory driving electrodes 103 ' of the group and a plurality of second driving electricity Pole 103 " is arranged in correspondence in the side opposite with the second induction electrode 101 " of reference electrode 101 '.
Other aspects of fingerprint detection element 410 according to the present embodiment are similar with aforementioned fingerprint detecting element, herein It repeats no more.
Figure 11 schematically shows the electronic device 500 according to one example embodiment of the disclosure, wherein may include above-mentioned Fingerprint Identification sensor.Electronic device 500 is such as can be smart mobile phone, tablet computer.
As shown, electronic device includes transparent cover plate 501.Transparent cover plate 501 includes viewing area 511 and non-display area 515.Fingerprint Identification sensor may be disposed at viewing area 511 or non-display area 515.
According to some embodiments, a part for the non-display area of transparent cover plate is used as the substrate 111 of fingerprint Identification sensor.
Figure 12 is schematically shown according to the collection of the touch sensor of disclosure example embodiment and fingerprint sensor in groups Part 600.
As shown in figure 12, the integrated package 600 of touch sensor and fingerprint sensor includes the first flexible and transparent substrate 611 With the first embossed layer 613.First embossed layer 613 is formed in the first flexible and transparent substrate 611, and 613 surface of the first embossed layer is set It is equipped with multiple first grooves 615 and multiple second grooves 617.
Integrated package 600 further includes:First touch electrode layer 619 is arranged in multiple first grooves 615;And fingerprint Detecting element 616 and a plurality of leads 618 being connect with fingerprint detection element 616 are arranged in multiple second grooves 617.
Integrated package 600 further includes:Second flexible and transparent substrate 621 is arranged on the part of the first embossed layer 613;With And second embossed layer 623, it is formed in the second flexible and transparent substrate 621.It is recessed that second embossed layer, 623 surface is provided with multiple thirds Slot 625.
Integrated package 600 further includes:Second touch electrode layer 629 is arranged in multiple third grooves 625.
First touch electrode layer 619 and the second touch electrode layer 629 are for constituting touch sensor, for brevity, This is repeated no more.
The technique for manufacturing the integrated package is similar with the manufacture technique of fingerprint Identification sensor noted earlier, herein no longer It repeats.Fingerprint Identification sensor noted earlier can be applied in integrated package 600, therefore repeat no more.According to some implementations Example, the first flexible and transparent substrate 611 and the second flexible and transparent substrate 621 are PET film.
According to the embodiment of the disclosure, it is possible to provide a kind of integrated package of touch sensor and fingerprint sensor.By Identical technique can be utilized to be fabricated to integrated package simultaneously in touch sensor and fingerprint Identification sensor, therefore can reduced into This.Furthermore it is possible to which component wear caused by when avoiding composition, improves yield rate.
Figure 13 schematically shows the electronic device 700 according to disclosure example embodiment, shown in Figure 12 Integrated package.Electronic device 700 can be mobile phone, tablet computer etc..Figure 13 provides diagram by taking mobile phone as an example, but the disclosure not with This is limited.
As shown in figure 13, electronic device 700 may include transparent cover plate 630.Transparent cover plate 630 has top surface 631 and top surface 631 opposite bottom surfaces 633 and the side 635 for connecting top surface 631 and bottom surface 633.Transparent cover plate 630 includes 636 He of viewing area Non-display area 638.
Integrated package can fit in bottom surface 633 by OCA layers 651, and bend and fit in 635 He of side by OCA layers The non-display area 638 of top surface 631.Fingerprint detection element 616 is located on top surface 631.A plurality of leads 618 is extended to from top surface 631 Bottom surface 633.
Set-up mode of the integrated package 600 on transparent cover plate is not limited to shown in Figure 13.For example, it is also possible to make the first flexibility Transparent substrates 611 are adjacent with transparent cover plate 630, and bottom surface 633 is fitted in by OCA layers 651.
According to some embodiments, electronic device 700 may also include the protective layer 653 of covering fingerprint detection element 616, use In protection fingerprint detection element 616.Protective layer 653 can be such as diamond-like-carbon, silica or UV glue.Protective layer can lead to It crosses spraying technology or printing technology is formed.
First touch electrode layer 619 and the second touch electrode layer 629 and lead 618 can pass through 641 electricity of different side's conducting resinl It is connected to external circuit, such as flexible printed circuit board 643, but the disclosure is not limited.
It is particularly shown and described the illustrative embodiments of the disclosure above.It should be understood that the present disclosure is not limited to institute Disclosed embodiment, on the contrary, the disclosure is intended to cover the various modifications comprising in the spirit and scope of the appended claims And equivalent arrangements.

Claims (15)

1. the integrated package of a kind of touch sensor and fingerprint sensor, including:
First flexible and transparent substrate;
First embossed layer is formed in the first flexible and transparent substrate, and the first coining layer surface is provided with multiple first Groove and multiple second grooves;
First electrode layer is arranged in the multiple first groove;
Fingerprint detection element and a plurality of leads being connect with the fingerprint detection element are arranged in the multiple second groove;
Second flexible and transparent substrate is arranged on the part of first embossed layer;
Second embossed layer is formed in the second flexible and transparent substrate, and the second coining layer surface is provided with multiple thirds Groove;
The second electrode lay is arranged in the multiple third groove, and the first electrode layer and the second electrode lay are used for structure At touch sensor,
The wherein described fingerprint detection element includes:
First induction electrode;
A plurality of first driving electrodes, a plurality of first driving electrodes are arranged in parallel and are separated from each other, and described a plurality of first drives Moving electrode is opposite to define multiple first detector gaps at interval with first induction electrode respectively;
Second induction electrode is parallelly oppositely arranged with first induction electrode and positioned at first induction electrode and institute State the opposite side of a plurality of first driving electrodes;
A plurality of second driving electrodes, a plurality of second driving electrodes are arranged in parallel and are separated from each other, and described a plurality of second drives Moving electrode is opposite to define multiple second detector gaps at interval with second induction electrode respectively, and described a plurality of second drives Moving electrode is arranged in correspondence with a plurality of first driving electrodes in second induction electrode and first induction electrode Opposite side;
Wherein, first groove, second groove and the third groove are formed by imprint process.
2. integrated package as described in claim 1, wherein the pitch between adjacent first driving electrodes and adjacent second driving Pitch between electrode is equal to each other and in 50-60 μ m, the width of the width of the first driving electrodes and the second driving electrodes Degree is equal to each other and in 20-45 μ ms, the size of the first detector gap and the second detector gap is equal to each other and in 20-40 In μ m.
3. integrated package as described in claim 1, wherein the first flexible and transparent substrate and the second flexible and transparent base Bottom is PET film.
4. integrated package as claimed in claim 3, wherein first embossed layer and second embossed layer are ultra-violet curing Resin, hot-setting adhesive, light binding or from dry glue.
5. integrated package as claimed in claim 4, wherein the first electrode layer, the second electrode lay and/or the finger Line detecting element includes conductive grid.
6. a kind of electronic device, including such as integrated package described in any one of claim 1 to 5.
7. electronic device as claimed in claim 6 further includes transparent cover plate, the transparent cover plate have top surface, with top surface phase To bottom surface and connect the sides of top and bottom, the transparent cover plate includes viewing area and non-display area, and the collection is in groups Part fits in the bottom surface by OCA, and bends and fit in the described non-display of the side and the top surface by OCA Area, wherein the fingerprint detection element is located on the top surface, a plurality of leads extends to the bottom surface from the top surface.
8. electronic device as claimed in claim 7, wherein the first flexible and transparent substrate is than the second flexible and transparent base Bottom is closer to or further from the transparent cover plate.
9. electronic device as claimed in claim 7 further includes the protective layer for covering the fingerprint detection element.
10. a kind of fingerprint Identification sensor, including:
Substrate;
The embossed layer being formed in substrate, the coining layer surface are provided with multiple grooves;And
Fingerprint detection element is placed in the multiple groove;
The wherein described fingerprint detection element includes:
First induction electrode;
A plurality of first driving electrodes, a plurality of first driving electrodes are arranged in parallel and are separated from each other, and described a plurality of first drives Moving electrode is opposite to define multiple first detector gaps at interval with first induction electrode respectively;
Second induction electrode is parallelly oppositely arranged with first induction electrode and positioned at first induction electrode and institute State the opposite side of a plurality of first driving electrodes;
A plurality of second driving electrodes, a plurality of second driving electrodes are arranged side by side and are separated from each other, and described a plurality of second drives Moving electrode is opposite to define multiple second detector gaps at interval with second induction electrode respectively, and described a plurality of second drives Moving electrode is arranged in correspondence with a plurality of first driving electrodes in second induction electrode and first induction electrode Opposite side;
Wherein, the multiple groove is formed by imprint process.
11. fingerprint Identification sensor as claimed in claim 10, wherein pitch between adjacent first driving electrodes and adjacent Pitch between second driving electrodes is equal to each other and in 50-60 μ m, the width of the first driving electrodes and the second driving The width of electrode is equal to each other and in 20-45 μ m, and the size of the first detector gap and the second detector gap is equal to each other And in 20-40 μ ms.
12. fingerprint Identification sensor as claimed in claim 11, wherein the fingerprint detection element further includes the first reference electricity Pole and the second reference electrode and a plurality of first illusory driving electrodes and a plurality of second illusory driving electrodes,
First reference electrode is parallelly oppositely arranged with first induction electrode and positioned at first induction electrode The side opposite with a plurality of first driving electrodes, second reference electrode and second induction electrode are parallelly opposite It is arranged and is located at the side opposite with a plurality of second driving electrodes of second induction electrode,
The a plurality of first illusory driving electrodes are arranged in parallel and are electrically connected to each other, a plurality of first illusory driving electrodes and institute A plurality of first driving electrodes are stated to be arranged in correspondence in the side opposite with first induction electrode of first reference electrode,
The a plurality of second illusory driving electrodes are arranged in parallel and are electrically connected to each other, a plurality of second illusory driving electrodes and institute A plurality of second driving electrodes are stated to be arranged in correspondence in the side opposite with second induction electrode of second reference electrode.
13. fingerprint Identification sensor as claimed in claim 11, wherein the fingerprint detection element includes metallic particles, graphite Alkene, carbon nanotube or conducting polymer composite.
14. fingerprint Identification sensor as claimed in claim 13, wherein the fingerprint detection element includes conductive grid.
15. a kind of electronic device includes the fingerprint Identification sensor as described in any one of claim 10 to 14.
CN201410313038.4A 2014-07-02 2014-07-02 Fingerprint Identification sensor, integrated package and electronic device Expired - Fee Related CN104050484B (en)

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