KR20170087358A - Image sensor package for finger-print and electronic device capable of detecting finger-print - Google Patents

Abstract

The present invention relates to a fingerprint sensor. A fingerprint sensor package includes: a glass substrate for providing a light path for acquiring a fingerprint image; a parallel surface light generator positioned at a lower side of the glass substrate to irradiate parallel light to a lower surface of the glass substrate; And an image sensor for generating the fingerprint image.

Description

Technical Field [0001] The present invention relates to a fingerprint sensor package and an electronic device having a fingerprint recognition function,

The present invention relates to a fingerprint sensor.

The fingerprint sensor captures an image of the fingerprint and converts it into an electric signal. In order to capture a fingerprint image, a conventional optical fingerprint sensor has an optical system for irradiating a fingerprint to reflect light. However, since an optical system such as a prism, a reflection mirror, and a lens generally has a considerable volume, an electronic device equipped with an optical fingerprint sensor is difficult to miniaturize.

On the other hand, the number and types of electronic devices equipped with fingerprint sensors are increasing, especially in portable electronic devices such as mobile phones and tablets. In order to mount the fingerprint sensor on the front surface of the electronic device, the sensing portion of the fingerprint sensor contacting the fingerprint must be exposed to the outside. Therefore, when the entire front surface of the electronic device is covered with a protective medium, for example, a cover glass or a transparent film for the purpose of design or display protection, a fingerprint sensor such as a capacitive sensor for detecting a change in capacitance is provided on the front side of the electronic device It is difficult to mount.

It is an object of the present invention to provide an optical fingerprint sensor package capable of generating a fingerprint image under a protective medium while enabling miniaturization.

In an embodiment according to one aspect of the present invention, a fingerprint sensor package is provided. A fingerprint sensor package includes: a glass substrate for providing a light path for acquiring a fingerprint image; a parallel surface light generator positioned at a lower side of the glass substrate to irradiate parallel light to a lower surface of the glass substrate; And an image sensor for generating the fingerprint image. Here, the parallel plane light generator may irradiate the parallel plane light so that the angle between the direction perpendicular to the lower surface of the glass substrate and the traveling direction of the parallel plane light is 85 degrees to 90 degrees.

In one embodiment, the parallel surface light generator may include a light source for generating an omnidirectional light, and a guide for guiding the parallel surface light in the omnidirectional light, and an output terminal for outputting the omnidirectional light. In addition, the parallel surface light generator may further include an incident angle adjuster positioned between the parallel surface light generator and the image sensor, for correcting an angle at which the omnidirectional light enters the lower surface of the glass substrate.

In one embodiment, the parallel plane light generator may include a reflector for adjusting the non-directional light to the parallel plane light, and a light source for generating the non-directional light toward the reflector.

In one embodiment, the lower surface of the glass substrate is an inclined surface formed so as to reduce the thickness of the glass substrate in a direction of one side of the glass substrate, and the parallel surface light generator may irradiate parallel surface light to the inclined surface.

In one embodiment, the parallel surface light generator may be a laser diode or a light emitting diode (LED) that emits parallel surface light having a high linearity. In addition, the parallel plane light generator may further include a reflector for reflecting the highly parallel planar surface light toward the lower surface of the glass substrate, wherein the reflector may be spaced from the laser diode or the LED.

In one embodiment, the parallel surface light is near-infrared, the parallel surface light generator is periodically turned on and off, and the image sensor generates both a fingerprint image upon turning on the parallel surface light generator and a fingerprint image when turning off the parallel surface light generator can do.

In one embodiment, the parallel surface light is short wavelength light having a wavelength of 320 to 450 nm. In addition, the fingerprint sensor package may further include a short wavelength band-pass film attached to at least one of an upper surface and a lower surface of the glass substrate .

In one embodiment, the image sensor can be touched by using a transparent material with respect to the wavelength range of the parallel surface light so that no air is interposed on the lower surface of the glass substrate.

In an embodiment according to another aspect of the present invention, a fingerprint sensor package is provided. The fingerprint sensor package includes a glass substrate for providing a light path for acquiring a fingerprint image, an image sensor which is in close contact with a center of a lower surface of the glass substrate and generates the fingerprint image, And a first parallel plane light generator and a second parallel plane light generator that respectively irradiate the first parallel plane light and the second parallel plane light to the lower surface of the glass substrate in the direction of the image sensor. Here, the first parallel plane light generator and the second parallel plane light generator may irradiate the parallel plane light so that the angle between the direction perpendicular to the lower surface of the glass substrate and the traveling direction of the parallel plane light is 85 degrees to 90 degrees.

In one embodiment, when either the first parallel plane light generator or the second parallel plane light generator is turned on, the other may be turned off, turned on, or turned off at the same time.

In addition, a third parallel surface light generator and a fourth parallel surface light generator, which are located opposite to each other on the lower surface of the glass substrate and irradiate the third parallel surface light and the fourth parallel surface light to the lower surface of the glass substrate in the direction of the image sensor, The traveling direction of the first parallel plane light and the traveling direction of the third parallel plane light may be vertical.

In one embodiment, the image sensor includes a substrate, a light receiving element formed on an upper surface of the substrate, a protection layer formed on the substrate, and a protection layer formed on the protection layer, And a shield layer which forms an optical path at an angle.

In another embodiment, the image sensor may include a substrate, a light receiving element formed on an upper surface of the substrate, a protective layer formed on the substrate, and a light emitting element formed on the light receiving element in the protective layer, And may include a plurality of metal layers which form an inclined path.

In one embodiment, at least a portion of the upper surface of the protective layer may be color coated.

In an embodiment according to another aspect of the present invention, an electronic apparatus is provided. The electronic device includes a protective medium for increasing a light path for acquiring a fingerprint image and a fingerprint sensor package adhered to the protective medium. Here, the fingerprint sensor package includes a glass substrate for providing a light path for acquiring a fingerprint image, a parallel surface light generator positioned at a lower side of the glass substrate and irradiating a parallel light to the lower surface of the glass substrate, And an image sensor which is in close contact with the bottom surface and generates the fingerprint image. The fingerprint sensor package includes a glass substrate for providing a light path for acquiring a fingerprint image, an image sensor which is in contact with a central portion of a lower surface of the glass substrate and generates the fingerprint image, And a first parallel plane light generator and a second parallel plane light generator that respectively irradiate the first parallel plane light and the second parallel plane light to the lower surface of the glass substrate in the direction of the image sensor.

The fingerprint sensor package according to the embodiment of the present invention can generate a fingerprint image under the protection medium while being capable of miniaturization.

Hereinafter, the present invention will be described with reference to the embodiments shown in the accompanying drawings. For the sake of clarity, throughout the accompanying drawings, like elements have been assigned the same reference numerals. It is to be understood that the present invention is not limited to the embodiments illustrated in the accompanying drawings, but may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view illustrating a schematic structure and operation principle of a fingerprint sensor package. FIG.
FIG. 2 is an exemplary view showing details of A and C of FIG. 1 to explain the change of the refraction angle according to the incident angle.
FIG. 3 is a perspective view exemplarily illustrating an example in which the fingerprint sensor package shown in FIG. 1 is located under the protection medium. FIG.
FIG. 4 is an enlarged cross-sectional view of a lower portion of one side of a fingerprint sensor package to illustrate an example of a parallel surface light generator. FIG.
5 is a cross-sectional view illustrating an example of the role of the incident angle adjuster shown in FIG.
6 is an enlarged cross-sectional view of one side lower portion of the fingerprint sensor package in order to illustrate another example of the parallel surface light generator.
FIG. 7 is a bottom view of the bottom surface of the fingerprint sensor package to illustrate the parallel surface light generator of FIG. 6;
8 is an enlarged cross-sectional view of one side lower portion of the fingerprint sensor package in order to illustrate another example of the parallel surface light generator.
Fig. 9 is a cross-sectional view for explaining an example in which the lower surface of the glass substrate is formed obliquely.
10 is a perspective view exemplarily illustrating an example in which the fingerprint sensor package is disposed under the protection medium;
11 and 12 are cross-sectional views taken along line I-I 'to illustrate the operation of the fingerprint sensor package of FIG.
13 is a cross-sectional view illustrating an exemplary structure and operation of the fingerprint sensor package.
14 is a bottom view for illustrating the structure of the fingerprint sensor package.
Fig. 15 is a top view for explaining an operation of the fingerprint sensor package shown in Fig. 12 by way of example.
16 is a cross-sectional view exemplarily illustrating one structure of the image sensor.
17 is a sectional view for explaining another structure of the image sensor by way of example.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

As used herein, the terms " substantially ", " substantially " and " substantially " are expressions for considering margins or possible errors to be applied in actual implementation. For example, " substantially 90 degrees " should be interpreted to mean an angle that can be expected to have the same effect as the effect at 90 degrees. As another example, "little" should be interpreted to mean something negligible even if something is negligible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view illustrating a schematic structure and operation principle of a fingerprint sensor package. FIG.

Referring to FIG. 1, a fingerprint sensor package includes an image sensor 100, a glass substrate 110, and a parallel surface light generator 120.

The parallel plane light generator 120 is positioned at a lower side of the glass substrate 110 and irradiates the parallel plane light 130 to the lower surface of the glass substrate 110 in the direction of the image sensor 100. The angle between the traveling direction of the parallel plane light 130 and the vertical direction of the lower surface of the glass substrate 110, that is, the incident angle of the parallel plane light 130, may be 85 degrees to 90 degrees. In other words, the parallel plane light generator 120 irradiates the parallel plane light 130 substantially parallel to the lower surface of the glass substrate 100. In one embodiment, the parallel surface light generator 120 may be a surface light emitting device in which the entire surface of one or more surfaces of the parallel surface light generator 120 facing the image sensor 100 emits light. For example, the parallel plane light generator 120 may be a laser diode or an LED (Light Emitting Diode) capable of emitting parallel plane light having a high linearity. In addition, various structures of the parallel plane light generator 120 will be described in detail with reference to FIGS.

In one embodiment, the parallel plane light generator 120 may generate near-infrared (NIR) parallel plane light having a wavelength of 850 nm to 950 nm. Near-infrared rays have a better light absorption rate in the skin than short-wavelength light, so that a clear fingerprint image can be obtained. Therefore, in the case of using the near-infrared parallel plane light, the fingerprint image is acquired while turning on or off the parallel plane light generator 120 at a constant frequency, and the difference between the fingerprint image acquired at turn- It can be used for recognition. On the other hand, when the electronic device equipped with the fingerprint sensor package is used outdoors, the near infrared rays included in the natural light can be diffused into the finger. In this case, as opposed to the fingerprint image obtained by the parallel plane light, the ridge of the fingerprint may appear relatively bright and the valley may appear dark. Therefore, a fingerprint image obtained when the parallel surface light generator 120 is turned on and a fingerprint image obtained when the turn-off is turned off can be used for fingerprint recognition.

In another embodiment, the parallel plane light generator 120 may generate short-wavelength parallel plane light. Here, the parallel plane light may be UVA (Ultraviolet A) having a wavelength of 320 to 400 nm or blue light having a wavelength of 450 nm or less. When the electronic device equipped with the fingerprint sensor package is used in the outdoors, the pixels of the image sensor 100 are saturated by the external light, so that the fingerprint image can not be generated. In order to prevent such a phenomenon, short-wavelength parallel light can be used.

The glass substrate 110 provides a light path through which the parallel light 130 is incident on the image sensor 100. The parallel plane light 130 is refracted at the lower surface of the glass substrate 110 to be refracted parallel light 140 and 150. The refracted light 140 and 150 are incident on the upper surface of the glass substrate 110 (145 and 155, hereinafter referred to as reflected light). The reflected lights 145 and 155 are incident on the image sensor 100 and used for generating a fingerprint image. The width W_LE of the effective parallel light incidence region of the lower surface of the glass substrate 110 can be determined by the incidence angle of the parallel light 130. The width W_C of the effective fingerprint contact area on the upper surface of the glass substrate 110 is determined by the thickness T _GS of the glass substrate 110 so that the width of the fingerprint image can be determined. The effective fingerprint contact area is an area where the reflected light 145 or 155 is absorbed or reflected by the fingerprint among the areas where the refracted light 140 and 150 are primarily reflected and is incident on the image sensor 100. Therefore, the width W_C of the effective fingerprint contact area may be less than or equal to the width W_IS of the image sensor 100. The width W_C of the effective fingerprint contact area that varies depending on the thickness T _GS of the glass substrate 110 will be described in detail with reference to FIG.

The width W_GS of the glass substrate 110 is larger than the width W_IS of the image sensor 100. As shown in FIG. 1, the glass substrate 110 provides a light path through which the parallel surface light 130 incident through the lower surface is primarily reflected on the upper surface and is incident on the image sensor 100. The parallel light 130 incident on the lower surface of the glass substrate 110 is refracted by the refraction angle determined by the incident angle and directed to the upper surface of the glass substrate 110. The refracted light beams 140 and 150 are first reflected at the same angle as the refraction angle on the upper surface of the glass substrate 110 and are incident on the image sensor 100. As a result, an effective fingerprint contact area on the upper surface of the glass substrate 110 is formed between the image sensor 100 and the parallel-surface light generator 120. As seen from the top of the fingerprint sensor package, the effective fingerprint contact area and the image sensor 100 may overlap at least partially according to the thickness T _GS of the glass substrate 110.

The image sensor 100 is located on the other side of the glass substrate 110 and the upper surface of the image sensor 100 is closely attached to the lower surface of the glass substrate 110. The upper surface of the glass substrate 110 and the upper surface of the image sensor 100 are substantially flat and can be closely contacted with air using a transparent material such as clear epoxy for the wavelength range to be used. When air is interposed between the image sensor 100 and the lower surface of the glass substrate 110, the reflected light 145 or 155 is reflected by the lower surface of the glass substrate 110 or the image sensor 100 due to the difference in refractive index between the glass substrate and the air layer. The surface reflectance at the upper surface is increased, and as a result, the reflected light 145, 155 is refracted in the direction parallel to the air layer. At this time, the refraction angle can be equal to the initial incidence angle. As a result, the reflected light 145 and 155 are not incident on the image sensor 100. If the image sensor 100 is not attached to the lower surface of the glass substrate 110, light can be incident on the image sensor 100 at various incident angles through the air layer from the outside.

The image sensor 100 generates a fingerprint image 160. In the fingerprint image 160, the ridge of the fingerprint is relatively dark and the fingerprint of the fingerprint is relatively bright. In the effective fingerprint contact area, the portion A where the ridge of the fingerprint comes in contact absorbs or scatters the refracted light 140. Therefore, the reflected light 145 coming from the portion A which is in contact with the ridge of the fingerprint disappears or has a relatively small amount of light. For this reason, the image sensor 100 hardly detects the reflected light 145 reflected by ridges. On the other hand, in the effective fingerprint contact area, the portion B where the finger of the fingerprint comes into contact does not absorb or scatter the refracted light 150. [ Therefore, the reflected light 155 emitted from the portion B that is in contact with the valleys of the fingerprint has a light amount that is hardly lost. Thereby, the image sensor 100 can detect the reflected light 155 reflected by the bone. Therefore, in the fingerprint image 160, the score B 'of the fingerprint is relatively bright compared to the ridge A' of the fingerprint.

FIG. 2 is an exemplary view showing details of A and C of FIG. 1 to explain the change of the refraction angle according to the incident angle.

2 (a) to 2 (c), the incident angles of the parallel light 210a, 210b and 210c are defined as? 1, and the refraction angle is defined as? 2. The incident angle? 1 is an angle between the traveling direction of the parallel light 210a, 210b and 210c and the direction perpendicular to the lower surface of the glass substrate 200. The refraction angle? 2 is a distance between the traveling direction of the refracted rays 220a, 220b, And an angle between the vertical direction of the lower surface of the substrate 200.

The parallel plane lights 210a, 210b, and 210c are irradiated from the parallel plane light generator and are incident on the glass substrate 200 at the incident point C. 2, the parallel light 210a, 210b, 210c is incident on the glass substrate 200 having the refractive index N2 = 1.5 via the air having the refractive index N1 = 1.0, for example. In the incident point C, the incident angle? 1 and the refraction angle? 2 have the same relationship as N1 X Sin? 1 = N2 X Sin? 2. Using this relationship, the incidence angle [theta] 1 is increased by 5 degrees from 0 [deg.] To calculate the refraction angle [theta] 2, the following Table 1 can be obtained.

Referring to Table 1, when the incident angle? 1 is 0 degree, the parallel plane lights 210a, 210b, and 210c are not refracted and are incident on the glass substrate 200, and the refraction angle? 2 is continuously increased as the incident angle? 1 is increased. In the section where the incident angle &thetas; 1 changes by 5 degrees from 0 DEG to 35 DEG, the refraction angle &thetas; 2 increases by about 3 DEG and in the section where the incident angle &thetas; 1 varies by 5 DEG from 35 DEG to 60 DEG, In the section where the angle of incidence is changed from 60 degrees to 80 degrees by 5 degrees, the refraction angle &thetas; 2 increases by approximately 1 degree, and in the section where the incidence angle &thetas; 1 changes from 80 degrees to 90 degrees by 5 degrees, the refraction angle &thetas; The distance x between the incident point C and the point at which the reflected light 230a, 230b or 230c meets the lower surface of the glass substrate 200 according to the incident angle? 1 and the thickness T _GS of the glass substrate 200, The incident angle &thetas; 1 is increased more than 55 DEG, and the increase DELTA x starts to decrease. When the incident angle &thetas; 1 is larger than 85 DEG, the increase DELTA x becomes much smaller than 85 DEG. In other words, if the incident angle? 1 falls within the range of 85 to 90 degrees, even if the incident angle? 1 changes, the reflected light becomes the same as the parallel light having almost no change in the distance x, and the uniform refracted light 220a, 220b, 230a, 230b, 230c may be generated.

On the other hand, if the thickness of the glass substrate is increased from 1 mm to 2 mm, the optical paths of the refracted rays 220a, 220b and 220c and the uniform reflected rays 230a, 230b and 230c in the glass substrate 200 are increased, As a result, the distance x increases substantially in proportion to the height increase of the organic substrate 200. The increase in distance x indicates that the effective fingerprint contact area formed on the upper surface of the glass substrate 200 increases. The relationship in which the effective fingerprint contact area capable of detecting the fingerprint increases as the optical path increases will be described with reference to FIG.

FIG. 3 is a perspective view exemplarily illustrating an example in which the fingerprint sensor package shown in FIG. 1 is located under the protection medium. FIG.

The protective medium is an optically transparent medium and prevents the outer surface of the electronic device from being damaged. An example of such a protective medium is a cover glass which is attached to the front of the mobile phone to protect the display. On the other hand, in FIG. 3, one protective medium having a thickness T _CG is illustrated, but two or more protective media may be overlapped. For example, a protective film may be attached to the upper surface of the cover glass. Although the protective medium is shown as having the same shape and width as the fingerprint sensor package for the sake of simplicity, it is needless to say that the protective medium can be extended in the lateral direction.

Referring to FIG. 3, the upper surface of the glass substrate 310 of the fingerprint sensor package is in close contact with the lower surface of the cover glass, which is a protective medium, so as to prevent air from intervening therebetween. When the upper surface of the glass substrate 310 is brought into close contact with the lower surface of the cover glass, the refracted light reaches the upper surface of the cover glass without being reflected by the upper surface of the glass substrate 310 and the air. When air is interposed between the cover glass and the glass substrate 310, the surface reflectance of the refracted light on the upper surface of the glass substrate 310 or the lower surface of the cover glass is increased due to the difference in refractive index between the glass substrate and the air layer, The reflected light is refracted in the direction parallel to the air layer and is not incident on the glass substrate 310. Therefore, between the upper surface of the glass substrate 310 and the lower surface of the cover glass, air must be closely adhered thereto.

The width W_C 'of the effective fingerprint contact area and the width W_VD' of the effective detection area of the fingerprint sensor package can be increased by the protective medium. Here, it is assumed that the parallel plane light generator 320 irradiates the parallel plane light to the same parallel plane light incidence region regardless of the presence or absence of the protective medium.

In the absence of a cover glass, the glass substrate 310 having a thickness T _GS has an effective fingerprint incident area of width W_LE 'and an effective fingerprint contact area of width W_C'. Plane light is incident on the bottom surface of the glass substrate 310 before reaching the effective parallel-plane light incidence region, but is not used for generating the fingerprint image because it does not reach the effective detection region of the image sensor 300 can not do it. Since the width W_VD 'of the effective detection area of the image sensor 300 is smaller than the width W_IS of the image sensor due to the thickness T _GS of the glass substrate 310, the generated fingerprint image is a region in which the fingerprint is expressed, And has an unrepresented area 365. Since the image sensor 300 is in close contact with the lower surface of the glass substrate 310, the parallel surface light can not be advanced by the image sensor 300, I can not join you. As a result, an area 365 in which a fingerprint is not expressed occurs.

When there is a cover glass, the optical path of the refracted light and the reflected light is increased by the thickness T _CG of the cover glass. That is, the cover glass serves to increase the thickness of the glass substrate 310 from T _GS to T _total . The glass substrate 310 having a thickness T _total has an effective parallel light incidence region of width W_LE and an effective fingerprint contact region of width W_C. The width W_VD of the effective detection area of the image sensor 300 is substantially equal to the width W_IS of the image sensor due to the thickness T _total of the glass substrate 310 so that the generated fingerprint image has only the area 370 in which the fingerprint is expressed do. That is, since the reflected light reaching the image sensor 300 increases due to the thickness of the cover glass, the region where the fingerprint is not represented disappears.

The effective fingerprint contact area formed on the upper surface of the cover glass functions in the same manner as the effective fingerprint contact area formed on the upper surface of the glass substrate 310. That is, the refracted light is reflected or absorbed by the ridges and ridges of the fingerprint so that the reflected light can be used to generate the fingerprint image. As a result, the fingerprint sensor package can generate fingerprint images even under a protective medium such as a cover glass. On the other hand, the refractive index of the cover glass is preferably substantially the same as the refractive index of the glass substrate 310. However, since the cover glass and the glass substrate 310 are in close contact with each other, the width W_C of the effective fingerprint contact area does not change greatly regardless of the degree of refraction between the refracted light and the reflected light between the glass substrate-cover glass and the cover glass-glass substrate.

In order for the image sensor to produce a sharp fingerprint image, short wavelength parallel light can be used. Compared to light such as visible light or near-infrared light, the short-wavelength parallel surface light has a low effect of penetrating the finger or diffusing it in the skin. Accordingly, when the short-wavelength parallel-plane light is used, it can be very effective in shielding external light other than the parallel-plane light incident from the parallel-plane light generator 310. Shading of external light can be implemented in various ways. For example, the glass substrate 310 may have the function of a band-pass filter passing only short-wavelength light. 3, the short-wavelength band-pass film 330 passing through only the short-wavelength light is shown attached to the entire lower surface of the glass substrate 310. However, in the bottom surface of the glass substrate 310, A short-wavelength band-pass film may be interposed in only a region where the first glass substrate 310 is adhered to, or a short-wavelength band-pass film may be attached to all or a part of the upper surface of the glass substrate 310.

FIG. 4 is an enlarged cross-sectional view of one side of a fingerprint sensor package to illustrate an example of a parallel-surface light generator, and FIG. 5 is a cross-sectional view illustrating the role of the incident angle adjuster shown in FIG.

Referring to FIG. 4, the parallel plane light generator includes a light source 420 and a guide 421. The light source 420 may be an LED that emits an omnidirectional light. The non-directional light is guided to the parallel plane light by the guide 421 located at the output end of the light source 420. The guide 421 allows at least a part of the iridescent light to be irradiated on the lower surface of the glass substrate 410 at an incident angle of 85 degrees to 90 degrees. The parallel surface light incident by the guide 421 becomes the refracted light 440 in the glass substrate 410. In one embodiment, the guide 421 may be formed of a material that shields or absorbs the non-directional light toward the inner surface of the guide.

On the other hand, light 450, 460 having an incident angle greater than 90 degrees may pass through the optical path defined by guide 421. In order to prevent unwanted refracted light from being incident on the glass substrate 410 and causing the light 450 or 460 having an incident angle larger than 90 degrees to be incident on the glass substrate 410, And may be positioned between the sensor 400 and the parallel plane light generator. The light 450 having the first incident angle is reflected by the incident angle adjuster 430 and has a first incident angle smaller than 90 degrees and enters the lower surface of the glass substrate 410. At this time, since the first incident angle is refracted at an angle of 85 degrees or less, most of the refracted light is transmitted to the outside through the upper surface of the glass substrate 410 and disappears or is close to the light source 420 at an angle significantly different from the refracted light 440 The light reflected from the upper surface of the glass substrate 410 does not reach the image sensor 400 and is refracted to the lower surface of the glass substrate 410 again. The light 460 having a second incident angle (greater than the first incident angle) is reflected by the incident angle adjuster 430 to have a second incident angle and can not enter the bottom surface of the glass substrate 410.

The incident angle adjuster 430 can increase the parallel surface light incident on the glass substrate 410 while changing the path of the light with a large incident angle. The incident angle of the parallel plane light that can be adjusted to be incident on the glass substrate 410 may vary depending on the angle between the incident angle adjuster 430 and the glass substrate 410.

5 (a), when the incident angle adjuster 430 is positioned between the parallel plane light generator 420 and the image sensor 400 so as to be parallel to the glass substrate 410, the parallel plane light having an incident angle of 90 degrees to 95 degrees 470 are largely reflected from the upper surface of the incident angle adjuster 430 and become parallel plane light 471 having an incident angle of 85 ° to 90 ° which can be incident on the glass substrate 410. The first-order refracted parallel light from the upper surface of the incident angle adjuster 430 is reflected from the lower surface of the incident angle adjuster 430 and then refracted from the upper surface of the incident angle adjuster 430. The second refracted light becomes the parallel light 472 having an incident angle of 85 degrees to 90 degrees. On the other hand, a part of the first refracted parallel plane light exits from the lower surface of the incident angle adjuster 430 (473), but is not incident on the glass substrate 410. As a result, the parallel light incident on the glass substrate 410 increases, and a clearer fingerprint image can be generated.

The largest proportion of the radial optical paths from the light source 420, such as an LED, is straight-line light having an incident angle of substantially 90 degrees. When the incident angle adjuster 430 is positioned between the parallel plane light generator 420 and the image sensor 400 so as to be inclined at an angle of, for example, 5 degrees with respect to the glass substrate 410 as shown in FIG. 5 (b) The parallel plane light 480 having an incident angle of 90 degrees is mostly reflected on the upper surface of the incident angle adjuster 430 and becomes the parallel plane light 481 having an incident angle of 85 degrees to 90 degrees that can be incident on the glass substrate 410. 5 (b), when the upper surface of the incident angle adjuster 430 is inclined to the left, the upper surface of the incident angle adjuster 430 faces the parallel surface light generator 420 located on the left side. 5A, the parallel light that is refracted first from the upper surface of the incident angle adjuster 430 to the inside of the incident angle adjuster 430 is mostly reflected from the lower surface of the incident angle adjuster 430, 430 on the upper surface. The second refracted light becomes the parallel light 482 having an incident angle of 85 degrees to 90 degrees. On the other hand, a part of the first refracted parallel plane light exits from the lower surface of the incident angle adjuster 430 (483), but is not incident on the glass substrate 410. As a result, the parallel light incident on the glass substrate 410 increases, and a clearer fingerprint image can be generated.

FIG. 6 is an enlarged cross-sectional view of one side of the fingerprint sensor package to illustrate another example of the parallel surface light generator. FIG. 7 is a cross-sectional view of the bottom surface of the fingerprint sensor package Fig.

6 and 7, the parallel plane light generator includes a reflector 520 and a light source 525. The light source 525 may be a point light source LED that irradiates the omnidirectional light toward the reflecting mirror 520. The reflecting mirror 520 irradiates the parallel light 530 on the lower surface of the glass substrate 510 in the direction of the image sensor 500. The cross-section of the reflector 520, which reflects the non-directional light, is a parabolic mirror, and the curvature of the reflector 520 is such that the iridescent light emitted by the light source 525 is reflected by the reflector 520, . That is, the curvature of the cross section of the reflector 520 determines the incident angle of the parallel light 530.

The reflector 520 is extended by the length of the image sensor 500 in the longitudinal direction to guide the iridescent rays irradiated by the light source 525 into the parallel light 530. [ Referring to FIG. 7, the reflector 520 extends by the length of the image sensor 500, and may be a parabolic mirror curved in the leftward direction with reference to FIG. Here, the longitudinal direction is the vertical direction with reference to Fig. The longitudinal curvature of the reflector 520 may be determined so that the reflected parallel light 530 travels horizontally toward the image sensor 500. [ 7) in the longitudinal direction as well as the end surface (FIG. 6) of the reflecting mirror 520, it is possible to generate the parallel surface light 530 having a good linearity by using the point light source.

8 is an enlarged cross-sectional view of one side lower portion of the fingerprint sensor package in order to illustrate another example of the parallel surface light generator.

Referring to FIG. 8, the parallel plane light generator includes a light source 620 and a reflector 623. In one embodiment, the light source may be a laser diode or an LED that illuminates straight-ahead light 630 with high linearity. In another embodiment, the light source 620 may be an LED that emits an omnidirectional light. In this case, the non-directional light is guided to the rectilinear light 630 by the guides 621 and 622 located at the output end of the light source 620. The light source 620 may be disposed at a position close to the image sensor 600. This configuration increases the optical path from the light source 620 to the lower surface of the glass substrate 610, so that the parallel surface light with high linearity can be incident on the glass substrate 610.

The reflecting mirror 623 irradiates the lower surface of the glass substrate 610 with the parallel light in the direction of the image sensor 600. The reflector 623 is a parabolic mirror and the curvature of the reflector 623 can be determined so that the rectilinear light 630 is reflected by the reflector 623 and has an incident angle of 85 degrees to 90 degrees.

9 is a cross-sectional view for explaining an example in which the lower surface of the glass substrate is formed obliquely.

9, the lower surface of the glass substrate 710 includes a parallel surface PS on which the image sensor 700 is closely contacted, and an inclined surface SS formed so as to be thinner in the thickness direction of the glass substrate 710 in a direction of one side of the glass substrate 710 . The inclined plane SS is formed to be inclined at an angle of inclination? 3 with respect to the parallel plane PS. In Fig. 7, the parallel surface light generator irradiates the parallel surface light incident on the inclined surface SS at 85 to 90 degrees. Here, it goes without saying that the parallel plane light generator may have the configuration described in Figs. 5 and 6.

The inclined plane SS can make the thickness of the glass substrate 710 small. A glass substrate having a thickness T _SGS smaller than the thickness T _GS of the glass substrate shown in Fig. 1 can provide the same effective fingerprint contact area. Since the inclined surface SS has the inclination angle? 3 with respect to the parallel surface PS, the refraction angle? 2 'of the parallel surface light incident on the inclined surface SS becomes a value obtained by adding the inclination angle? 3 to the refraction angle? 2 shown in FIG. That is, when the refraction angle [theta] 2 'is increased, the optical path of the refracted light and the reflected light becomes longer in the glass substrate 700, and the inter-point distance x' at which the refracted light and the reflected light make contact with the lower surface of the glass substrate 700 increases do. Therefore, even if the thickness T _SGS of the glass substrate 700 is small, it becomes possible to obtain an effective fingerprint contact area and an effective detection area that are substantially equal to or wider than those generated in the structure shown in Fig.

The glass substrate 700 having the inclined surface shown in FIG. 9 can be applied to the configurations shown in FIGS. 10 to 14 as well as the configurations shown in FIGS. 1 to 3.

10 is a perspective view exemplarily illustrating an example in which the fingerprint sensor package is disposed under the protection medium;

10, the fingerprint sensor package includes an image sensor 800, a glass substrate 810, first and second parallel surface light generators 820 and 825, and the upper surface of the glass substrate 810 of the fingerprint sensor package Can be brought into close contact with the lower surface of the cover glass which is a protective medium.

The first and second parallel plane light generators 820 and 825 are located on one side lower portion and the other lower side of the glass substrate 810 and irradiate the lower surface of the glass substrate 810 in the direction of the image sensor 800 . As shown in FIG. 10, the first parallel plane light generator 820 is a parallel plane light from left to right, as shown in FIG. 10, although the incident angle of each parallel plane light irradiated by the first and second parallel plane light generators 820 and 825 is 85 degrees to 90 degrees. And the second parallel plane light generator 825 irradiates parallel light from right to left. For example, the first and second parallel surface light generators 120 may be laser diodes or LEDs (Light Emitting Diodes) capable of emitting parallel surface light with high linearity. In addition, parallel surface light generators having various structures described above with reference to FIGS. 6 to 8 can be applied. 9, the lower surface of the glass substrate 810 may include a plurality of inclined surfaces formed in the direction from the center portion where the image sensor 800 is closely attached to the right and left side surfaces.

In one embodiment, the first and second parallel surface light generators 820 and 825 may generate near-infrared parallel surface light. In another embodiment, the first and second parallel surface light generators 820 and 825 can generate short-wavelength parallel light.

The glass substrate 810 and the cover glass provide a light path through which the incident parallel light is incident on the image sensor 800. The parallel plane light enters the lower surface of the glass substrate 810 and is primarily reflected from the upper surface of the cover glass. Since the first and second parallel surface light generators 820 and 825 are located opposite to each other on one side and the other side of the glass substrate 810, the first effective fingerprint contact area 840 and the second useful fingerprint area 840 are formed on the upper surface of the cover glass, A contact region 845 is formed. If the thickness T _total is small, a region where a fingerprint image is not obtained may be formed between the first effective fingerprint contact region 840 and the second effective fingerprint contact region 845. If the thickness T _total increases, The width of the fingerprint contact area 840 and the width of the second effective fingerprint contact area 845 may increase, and the area where the fingerprint image is not obtained may be reduced. The reflected light from the first effective fingerprint contact area 840 and the second effective fingerprint contact area 845 is incident on the image sensor 800 and used for generating a fingerprint image.

The image sensor 800 is located at the center of the lower surface of the glass substrate 810 and the upper surface of the image sensor 800 is in close contact with the lower surface of the glass substrate 810. The lower surface of the glass substrate 810 and the upper surface of the image sensor 800 are substantially flat.

11 and 12 are cross-sectional views taken along line I-I 'to illustrate the operation of the fingerprint sensor package of FIG.

The first and second parallel surface light generators 920 and 925 are alternately turned on to irradiate the lower surface of the glass substrate 910 with the parallel surface light. 11, a first parallel plane light generator 920 located at a lower side of the glass substrate 910 is turned on to generate a first parallel plane light 921 between the first parallel plane light generator 920 and the image sensor 900 And the lower surface of the glass substrate 910 is irradiated. At this time, the second parallel plane light generator 925 is turned off. Refractive light refracted from the lower surface of the glass substrate 910 is reflected in the left region of the fingerprint non-acquisition region of the width W_ND of the fingerprint contact region of the width W_C ''. When reflected light is incident on the image sensor 900, a fingerprint image is generated. At this time, the reflected light is incident on only the remaining detection area 901 except the fingerprint non-acquisition area of the width W_ND in the image sensor 900. Accordingly, the fingerprint image generated by the image sensor 900 has the region 940 in which the fingerprint is touched and the region 945 in which the fingerprint is not expressed, which is in contact with the left region of the fingerprint contact region. The width of the area 945 in which the fingerprint is not expressed is equal to the width W_ND of the fingerprint unacquired area.

12, the second parallel plane light generator 925 located on the other side of the glass substrate 910 is turned on and the second parallel plane light 926 is transmitted between the image sensor 900 and the second parallel plane light generator 925 And the lower surface of the glass substrate 910 is irradiated. At this time, the first parallel surface light generator 920 is turned off. The refracted light refracted at the lower surface of the glass substrate 910 is reflected in the right region of the fingerprint non-acquisition region of the width W_ND among the fingerprint contact regions of the width W_C ''. The reflected light is incident on the image sensor 900 to generate a fingerprint image. At this time, the reflected light is incident only on the detection area 902 except the fingerprint non-acquisition area of the width W_ND in the image sensor 900. Therefore, the fingerprint image generated by the image sensor 900 has an area 950 in which a fingerprint is touched and a region 955 in which a fingerprint is not expressed, which is in contact with the right area of the fingerprint contact area. The width of the area 955 in which the fingerprint is not expressed is equal to the width W_ND of the fingerprint unacquired area. Since the image sensor 900 is in close contact with the lower surface of the glass substrate 910, the parallel surface lights 921 and 926 can no longer go straight by the image sensor 900, The incident light does not enter the bottom surface of the glass substrate 910. As a result, regions 945 and 955 in which fingerprints are not expressed occur.

In one embodiment, the fingerprint images generated through the processes described with reference to FIGS. 11 and 12 may be used for fingerprint recognition, or may be synthesized based on the areas 945 and 955 in which the fingerprint is not expressed, .

13 is a cross-sectional view illustrating an exemplary structure and operation of the fingerprint sensor package.

13, the fingerprint sensor package includes an image sensor 1100, a glass substrate 1110, first and second parallel surface light generators 1120 and 1125, and the upper surface of the glass substrate 1110 of the fingerprint sensor package Is in close contact with the lower surface of the cover glass which is a protective medium. Compared with the fingerprint sensor package shown in FIG. 10, the fingerprint sensor package shown in FIG. 13 can generate the fingerprint image by simultaneously turning on the first and second parallel surface light generators 1120 and 1125. To this end, the fingerprint sensor package shown in Fig. 13 includes an image sensor wider than the image sensor 800 shown in Fig. 10 or a pair of image sensors.

By increasing the width of the image sensor 1100, the first and second parallel surface light generators 1120 and 1125 can be turned on at the same time to generate a fingerprint image. 11, the first and second parallel surface light generators 1120 and 1125 located at both lower sides of the glass substrate 1110 concurrently transmit the first and second parallel plane lights 1121 and 1126 to the glass substrate 1110 ) Is irradiated to the lower surface. The first and second refracted light refracted from the lower surface of the glass substrate 1110 are respectively reflected in the left region and the right region of the fingerprint non-acquisition region of width W_ND among the fingerprint contact regions of width W_C ''. The first reflected light reflected by the left area of the fingerprint unacquired area W_ND is incident on the left detection area of the image sensor 1100 and the second reflected light reflected by the right area of the fingerprint unacquired area W_ND is incident on the right side of the image sensor 1100 Is incident on the detection region and a fingerprint image is generated. Therefore, the fingerprint image generated by the image sensor 1100 includes an area 1140 in which a fingerprint is touched in the left area of the fingerprint contact area, an area 1141 in which a fingerprint is touched in the right area of the fingerprint contact area, Lt; RTI ID = 0.0 > 1142 < / RTI > The fingerprint recognition can be performed by acquiring a plurality of fingerprint images while synthesizing the fingerprint images while moving the position of the fingerprint of the finger even if the area 1142 in which the fingerprint is not expressed exists.

Fig. 14 is a bottom view for explaining the structure of the fingerprint sensor package; Fig. Fig. 15 is a top view for explaining an operation of the fingerprint sensor package shown in Fig. 14 by way of example.

14, the upper surface of the image sensor 1200 is in close contact with the center of the lower surface of the glass substrate 1210, and the first to fourth parallel surface light generators 1220, 1221, 1222, Located on each side. As shown in FIG. 9, the lower surface of the glass substrate 1210 may include a plurality of inclined surfaces formed in a direction from the central portion where the image sensor 1200 is closely contacted to each side surface.

The first to fourth parallel plane light generators 1220, 1221, 1222 and 1223 are positioned below the respective sides of the glass substrate 1210 and irradiate the parallel light on the lower surface of the glass substrate 1310 in the image sensor 1200 direction. do. The incident angle of each parallel plane light irradiated by the first to fourth parallel plane light generators 1220, 1221, 1222 and 1223 is 85 degrees to 90 degrees. However, the first parallel plane light generator 1220 has the first parallel plane light The second parallel plane light generator 1221 irradiates the second parallel plane light from the right side in the left direction, the third parallel plane light generator 1222 irradiates the third parallel plane light in the downward direction from the upper side, 4 parallel plane light generator 1223 irradiates the fourth parallel plane light in the upward direction from the lower side. The traveling direction of the first parallel plane light or the second parallel plane light and the traveling direction of the third parallel plane light or the fourth parallel plane light may be perpendicular to each other.

The glass substrate 1210 is in the form of a rectangular plate and provides a light path through which incident parallel plane light is incident on the image sensor 1200.

Referring to FIG. 15, the first through fourth parallel plane light generators 1220, 1221, 1222, and 1223 are alternately turned on to irradiate the lower surface of the glass substrate 1310 with parallel plane light. 15A shows an effective fingerprint contact area 1320 formed on the upper surface of the glass substrate 1310 when the first parallel plane light generator 1220 is turned on and FIG. FIG. 15C shows an effective fingerprint contact area 1321 formed on the upper surface of the glass substrate 1310 when the generator 1221 is turned on. FIG. 15C shows the effective fingerprint contact area 1321 formed on the glass substrate 1310 when the third parallel surface light generator 1222 is turned on. 15D shows an effective fingerprint contact area 1322 formed on the upper surface of the glass substrate 1310 when the fourth parallel surface light generator 1223 is turned on, (1323). The fingerprint images generated through the processes described in FIGS. 15A to 15D may be processed and used for fingerprint recognition, combined, and used for fingerprint recognition.

On the other hand, two of the first through fourth parallel-surface light generators 1220, 1221, 1222, and 1223, which are opposed to each other, may be simultaneously turned on to irradiate the lower surface of the glass substrate 1310 with the parallel light. 15E shows the effective fingerprint contact area 1324 formed on the upper surface of the glass substrate 1310 when the first and second parallel surface light generators 1220 and 1221 are turned on, Represents an effective fingerprint contact area 1325 formed on the upper surface of the glass substrate 1310 when the third and fourth parallel surface light generators 1222 and 1223 are turned on.

Fig. 16 is a sectional view for explaining one example of the structure of the image sensor, and Fig. 17 is a sectional view for explaining another structure of the image sensor by way of example.

When external light is incident on the fingerprint sensor package, the pixels of the image sensor are saturated and the fingerprint image can not be generated. Particularly, when the electronic device equipped with the fingerprint sensor package is located outdoors, the fingerprint sensor package may not operate normally. In order to prevent such a situation, it is possible to attach a short-wavelength band-pass film which passes only short-wavelength light using the short-wavelength parallel plane light to the lower surface or the upper surface of the glass substrate. The structure shown in FIGS. 16 and 17 shows a structure of an image sensor that can minimize the influence of external light on fingerprint image generation.

16 shows a shield layer for light shielding implemented in a back-illuminated structure (BIS) image sensor. The image sensor includes a semiconductor substrate 1520, a light receiving element 1530 formed on the upper surface of the semiconductor substrate, and a light receiving element 1530 formed on the semiconductor substrate. The image sensor is electrically connected to the external connection terminal (not shown) A protective layer 1500 formed on the light receiving element 1530 and a shield layer 1510 formed on the light receiving element 1530 in the protective layer 1500 . Here, a photodiode is shown as an example of the light receiving element 1530, but it is not necessarily limited to this, and various types of light receiving elements may be used.

The shield layer 1510 blocks external light incident substantially vertically toward the light receiving element 1530. The shield layer 1510 may be formed of, for example, a metal. To this end, a plurality of shield layers 1510 are vertically formed on each of the plurality of light receiving elements 1530, and a plurality of shield layers 1510 are spaced apart from each other by a predetermined distance. The width of the shield layer 1510 defined by the transverse length and the longitudinal length is equal to or larger than the width of the light receiving element 1530 to block light incident vertically above the light receiving element 1530. On the other hand, a light 1555 incident at a predetermined angle toward each light receiving element 1530 from the upper left and / or a light 1555 incident at a certain angle toward each of the light receiving elements 1530 from the upper right pass through the light path 1550, May be defined by the distance between the plurality of shield layers 1510 and the height between the shield layer 1510 and the light receiving element 1530. [

At least a part of the area around the optical path in the upper surface of the protective layer 1500 may be color coated. In one embodiment, the top surface of the protective layer 1500, located vertically above the shield layer 1510, may be coated with, for example, a white or black material. If the area where the image sensor is located is different from the surrounding color, a visual sense of heterogeneity may be caused. Since the light path through which the reflected light enters the image sensor is formed from the upper surface of the protective layer 1500 to the light receiving element 1530, the upper surface of the protective layer 1500 is preferably coated with a darker color than the surrounding color.

17 shows a light-shielding structure implemented in a front-illuminated structure (FIS) image sensor. The image sensor includes a semiconductor substrate 1620, a light receiving element 1630 formed on the upper surface of the semiconductor substrate, a protective layer 1600 formed on the light receiving element 1630, a light receiving element 1630 formed in the protective layer 1600, And a metal layer 1610 forming an electric wiring between external connection terminals (not shown) and forming a light path inclined at a predetermined angle.

The metal layer 1610 including the M1 and M2 metal lines shields external light that is incident substantially vertically toward the light receiving element 1530. [ For this purpose, the M2 metal line is formed on the upper portion of the region where the M1 metal line is not formed, so that the light receiving element 1630 is covered by the M1 metal line and the M2 metal line when viewed from the top of the image sensor. On the other hand, although the M1 metal line is formed vertically above the light receiving element 1630 and the metal layer 1610 is shown as being formed of two metal lines, this is only an example, and the M2 metal line may be formed on the light receiving element 1630 As shown in Fig. In addition, the metal layer 1610 may include three or more metal lines. For example, when the metal layer 1610 is composed of M1 to M4 metal lines, the M3-M4 Metallalhuman distance may be M1-M2 metal The external light incident substantially vertically toward the light receiving element 1630 can be blocked. On the other hand, at least a part of the area around the optical path in the upper surface of the protective layer 1600 may be color coated. In one embodiment, the top surface of the protective layer 1600 located vertically above the topmost metal layer may be coated with, for example, a white or black material.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

It is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. .

Claims (22)

A glass substrate for providing a light path for fingerprint image acquisition;
A parallel surface light generator positioned at one side of the glass substrate and irradiating a parallel light to the lower surface of the glass substrate; And
And an image sensor which is in close contact with the other side surface of the glass substrate and generates the fingerprint image. The fingerprint sensor package according to claim 1, wherein the parallel plane light generator irradiates the parallel plane light so that an angle between a direction perpendicular to a lower surface of the glass substrate and a traveling direction of the parallel plane light is 85 degrees to 90 degrees. [3] The apparatus according to claim 2,
A light source for generating an irregular light beam; And
And a guide which is located at an output end from which the omnidirectional light is outputted and guides the parallel light in the omnidirectional light. The method of claim 3,
Further comprising an incident angle adjuster located between the parallel plane light generator and the image sensor and correcting an angle at which the non-directional light enters the lower surface of the glass substrate. [3] The apparatus according to claim 2,
A reflector for adjusting the non-directional light to the parallel light; And
And a light source that generates the omnidirectional light toward the reflector. The fingerprint sensor package according to claim 2, wherein a lower surface of the glass substrate is an inclined surface formed so that the thickness of the glass substrate is thinner in a direction of one side of the glass substrate, and the parallel surface light generator irradiates the surface light to the inclined surface. The fingerprint sensor package according to claim 2, wherein the parallel surface light generator is a laser diode or an LED (Light Emitting Diode) that emits parallel surface light having a high linearity. [7] The apparatus according to claim 7, wherein the parallel plane light generator further comprises a reflector for reflecting the parallel plane light having a high directivity and directing the parallel plane light toward the lower surface of the glass substrate,
Wherein the reflector is spaced apart from the laser diode or LED. The fingerprint sensor package according to claim 1, wherein the parallel surface light is near infrared rays. 10. The apparatus of claim 9, wherein the parallel plane light generator is periodically turned on and off,
Wherein the image sensor generates both a fingerprint image when the parallel surface light generator is turned on and a fingerprint image when the parallel surface light generator is turned off. The fingerprint sensor package according to claim 1, wherein the parallel surface light is short-wavelength light having a wavelength of 320 to 450 nm. The fingerprint sensor package according to claim 11, further comprising a short-wavelength band-pass film attached to at least one of an upper surface and a lower surface of the glass substrate. The fingerprint sensor package according to claim 1, wherein the image sensor is in close contact with a bottom surface of the glass substrate using a transparent material with respect to a wavelength range of the parallel plane light so as to prevent air from intervening therebetween. A glass substrate for providing a light path for fingerprint image acquisition;
An image sensor which is in close contact with a center of a lower surface of the glass substrate and generates the fingerprint image;
And a first parallel surface light generator and a second parallel surface light generator positioned opposite to each other on the lower surface of the glass substrate and for irradiating a first parallel surface light and a second parallel surface light to the lower surface of the glass substrate in the direction of the image sensor, Fingerprint sensor package. [Claim 14] The method according to claim 14, wherein the first parallel plane light generator and the second parallel plane light generator are arranged such that the angle between the direction perpendicular to the lower surface of the glass substrate and the advancing direction of the parallel plane light is 85 degrees to 90 degrees, Sensor package. 16. The fingerprint sensor package of claim 15, wherein when any one of the first parallel surface light generator and the second parallel surface light generator is turned on, the other is turned off. 16. The fingerprint sensor package of claim 15, wherein the first parallel surface light generator and the second parallel surface light generator are simultaneously turned on or off. [Claim 16] The light emitting device of claim 15, further comprising: a third parallel plane light generator positioned opposite to the lower surface of the glass substrate and irradiating a third parallel plane light and a fourth parallel plane light to the lower surface of the glass substrate in the image sensor direction; Further comprising a generator,
Wherein a traveling direction of the first parallel plane light and a traveling direction of the third parallel plane light are perpendicular to each other. 16. The image sensor of claim 15,
Board;
A light receiving element formed on an upper surface of the substrate;
A protective layer formed on the substrate; And
And a shield layer formed on the light-receiving element in the protective layer, the shield layer forming an optical path to the light-receiving element to be inclined. 16. The image sensor of claim 15,
Board;
A light receiving element formed on an upper surface of the substrate;
A protective layer formed on the substrate; And
And a plurality of metal layers formed on the light-receiving element in the protective layer to form an optical path to the light-receiving element. The fingerprint sensor package according to claim 19 or 20, wherein at least a part of the upper surface of the protective layer is coated with color. A protective medium for increasing the optical path for fingerprint image acquisition; And
An electronic device comprising a fingerprint sensor package according to any one of claims 1 to 21 adhered to said protective media.

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