WO2019090748A1 - 生物传感芯片及电子设备 - Google Patents

生物传感芯片及电子设备 Download PDF

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Publication number
WO2019090748A1
WO2019090748A1 PCT/CN2017/110612 CN2017110612W WO2019090748A1 WO 2019090748 A1 WO2019090748 A1 WO 2019090748A1 CN 2017110612 W CN2017110612 W CN 2017110612W WO 2019090748 A1 WO2019090748 A1 WO 2019090748A1
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Prior art keywords
substrate
biosensor chip
die
wafer die
static electricity
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PCT/CN2017/110612
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English (en)
French (fr)
Inventor
林峰
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深圳信炜科技有限公司
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Application filed by 深圳信炜科技有限公司 filed Critical 深圳信炜科技有限公司
Priority to PCT/CN2017/110612 priority Critical patent/WO2019090748A1/zh
Priority to CN201790000266.3U priority patent/CN209044625U/zh
Publication of WO2019090748A1 publication Critical patent/WO2019090748A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition

Definitions

  • the utility model relates to an antistatic biosensor chip and an electronic device.
  • biosensor chips are used to sense biometric information of a contact object when the user is in contact or in proximity.
  • a fingerprint sensor can sense an object that is in contact with or near the sensor and obtain a fingerprint image.
  • the human body is a conductor.
  • the static electricity of the human body may affect the circuit in the sensor, resulting in a decrease in the sensing efficiency of the biosensor chip or even failure.
  • the embodiments of the present invention aim to at least solve one of the technical problems existing in the prior art. To this end, the embodiments of the present invention need to provide a biosensor chip and an electronic device.
  • a biosensor chip includes: a substrate and a wafer die disposed on the substrate, and an electrostatic protection component, wherein the electrostatic protection component is located outside the wafer die, and The vertical height of the electrostatic protection component relative to the substrate is greater than the vertical height of the wafer die relative to the substrate, and the electrostatic protection component is used to vent static electricity.
  • the embodiment of the present invention provides an electrostatic protection element on the substrate and is located outside the wafer die, and the vertical height of the electrostatic protection component is greater than the vertical height of the wafer die, so when the object contacts the biosensor chip
  • the electrostatic protection component is closer to the object than the wafer die, and the static electricity generated by the object is first discharged through the electrostatic protection component, thereby preventing static electricity from affecting the wafer die through the wafer die.
  • the ESD protection component since the ESD protection component is located outside the wafer die, the ESD protection component does not affect the biosensing of the wafer die, thereby improving the biosensing effect.
  • the electrostatic protection element achieves electrostatic discharge by a height setting, the electrostatic protection element can be disposed as a small volume of the conductive member, thereby saving the manufacturing cost of the biosensor chip.
  • the ESD protection element is a wire.
  • the electrostatic protection element through the wire structure is not only simple in structure, but also has a small amount of material, thereby reducing material cost.
  • the ESD protection component of the wire structure is located outside the die dies, which not only does not affect the normal line of the die dies, but also the wires disposed outside the die dies can realize short-distance design and improve the support strength of the wires. .
  • the ESD protection element is disposed on the substrate by wire bonding.
  • the electrostatic protection component is realized by wire bonding, and the manufacturing process is simple and quick, and is easy to implement.
  • the projection surface of the wafer die on the substrate is quadrangular
  • the electrostatic protection component includes two
  • the two static protection components are disposed on the same side of the wafer die, or Corresponding to the opposite sides of the wafer die. In this way, not only the installation structure of the static electricity protection element is simplified, but also the electrostatic discharge effect is improved.
  • the ESD protection component comprises a plurality of and is distributed around the wafer die.
  • the ESD element can direct static electricity to the ground more quickly, thereby improving the electrostatic discharge effect.
  • two pads are disposed on the substrate corresponding to each of the static electricity protection elements, one end of the static electricity protection element is connected to one pad, and the other end of the static electricity protection element is connected to the other pad.
  • the electrostatic protection component is connected to the ground through a circuit on the printed circuit board; if the substrate is an insulating substrate, the electrostatic protection component is bound to the ground The flexible circuit board on the insulating substrate is connected to the ground.
  • the ESD protection element is attached directly or indirectly to the ground.
  • the biosensor chip further includes a package for encapsulating the wafer die, an ESD protection component, and filling a gap between the Wafer die and the ESD protection component .
  • the package body is remote from a side surface of the substrate for receiving contact or proximity input of an object, and the wafer die is used for information sensing of an object in contact or proximity.
  • the object information sensed by the wafer die includes one or more of a fingerprint, a palm print, an ear print, a heart rate, blood oxygen, blood pressure, and a vein.
  • the biosensor chip is one or more of an optical sensor chip, a capacitive sensor chip, and an ultrasonic sensor chip.
  • the wafer die is at least one.
  • the ESD element is arched, the top surface of the arch being beyond the upper surface of the wafer die.
  • the highest vertical height of the ESD protection element relative to the substrate is greater than the vertical height of the wafer die relative to the substrate.
  • the embodiment of the present invention further provides an electronic device, comprising: a housing and a biosensor chip disposed in or on the inside of the housing, and the biosensor chip is the biosensor according to any one of the above embodiments. chip. Therefore, it has all the beneficial effects of the above biosensor chip.
  • FIG. 1 is a schematic view showing a mounting structure of a conventional biosensor chip
  • FIG. 2 is a schematic diagram of a package structure of another conventional biosensor chip
  • FIG. 3 is a schematic side view showing the structure of a biosensor chip according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of an electrostatic protection component of the biosensor chip of the present invention.
  • 5a is a schematic view showing a distribution structure of two electrostatic protection elements in the biosensor chip of the present invention.
  • FIG. 5b is a schematic view showing another distribution structure of two electrostatic protection elements in the biosensor chip of the present invention.
  • 5c is a schematic view showing another distribution structure of two electrostatic protection elements in the biosensor chip of the present invention.
  • FIG. 6 is a schematic structural view of a biosensor chip according to another embodiment of the present invention.
  • FIG. 7 is a structure of an embodiment of a wafer die in the biosensor chip of the present invention.
  • FIG. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. .
  • features defining “first” or “second” may include one or more of the described features either explicitly or implicitly.
  • the meaning of "a plurality” is two or more, and unless otherwise specifically defined, the definition applies to the terms “multiple”, “multiple”, and the like.
  • Contact or “touch” includes direct or indirect contact.
  • the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be, for example, a fixed connection or a Disassemble the connection, or connect them integrally; they may be mechanical connections, electrical connections or communication with each other; they may be directly connected or Indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements.
  • installation is to be understood broadly, and may be, for example, a fixed connection or a Disassemble the connection, or connect them integrally; they may be mechanical connections, electrical connections or communication with each other; they may be directly connected or Indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the biosensor chip proposed by the utility model is used for sensing one or more of fingerprint, palm print, ear print, heart rate, blood oxygen, blood pressure and vein of an object.
  • the biosensor chip includes one or more of an optical sensor chip, a capacitive sensor chip, and an ultrasonic sensor chip.
  • FIG. 1 is a schematic diagram of a mounting structure of a conventional biosensor chip.
  • the biosensor chip 10 is provided with a metal ring 11 when the module is mounted, and the metal ring 11 is connected to the ground through the conduction line 12; and the metal ring 11 is provided with a center hole, and the biosensor chip 10 is located at the metal Inside the center hole of the ring 11.
  • the human body static electricity will be directed to the ground through the metal ring 11 for venting, thereby preventing the static electricity flowing from the human body to the biosensor chip 10 and damaging the biosensor chip 10.
  • FIG. 2 is a schematic diagram of a package structure of another conventional biosensor chip.
  • the biosensor chip 10' includes a package housing 13 and a sensing die 14 located within the package housing 13 and a circuit protection device 15 such as a TVS (Transient Voltage Suppressor) diode when the finger contacts or approaches At the time of the biosensor chip 10, human body static electricity will be clamped by the circuit protection device 15, thereby protecting the subsequent circuit components, i.e., the sensing die 14, from electrostatic damage.
  • TVS Transient Voltage Suppressor
  • the electrostatic problem can be solved by providing the metal ring 11 and the circuit protection device 15, the metal ring 11 and the circuit protection device 15 are both added to increase the manufacturing cost of the biosensor chip 10, 10', so the present invention proposes a A biosensor chip having a novel electrostatic protection structure can reduce the manufacturing cost of the biosensor chip 10.
  • FIG. 3 is a schematic side view showing the structure of a biosensor chip according to an embodiment of the present invention.
  • the novel biosensor chip 2 includes a substrate 20 and a die dies 21 disposed on the substrate 20 and an electrostatic protection component 22, and the vertical height h1 of the static protection component 22 relative to the substrate 20 is greater than the die dies 21 .
  • the vertical height h2 with respect to the substrate 20.
  • the ESD protection component By placing the ESD protection component on the substrate, and the vertical height of the ESD protection component is greater than the vertical height of the wafer die, when the object contacts the biosensor chip, the ESD protection component is closer to the wafer die.
  • the static electricity generated by the object is first vented by the electrostatic protection component, thereby preventing static electricity from affecting the wafer die through the die.
  • the ESD protection component since the ESD protection component is located outside the wafer die, the ESD protection component does not affect the biosensing of the wafer die, thereby improving the biosensing effect.
  • the electrostatic protection component since the electrostatic protection component is electrostatically discharged by the height setting, the electrostatic protection component can be set as a small volume of the conductive member, thereby saving the manufacturing cost of the biosensor chip.
  • the substrate 20 may include a transparent substrate such as, but not limited to, an insulating substrate such as a glass substrate, a plastic substrate, a crystal, a sapphire, or the like, and a non-transparent substrate such as, but not limited to, a silicon substrate. , printed circuit boards, metal substrates, and the like.
  • the substrate 20 may be a rigid material or a flexible material such as a flexible film.
  • the die dies 21 are connected to the substrate 20 through the conductive traces 202.
  • a pad 201 is disposed on the substrate 20, and the static electricity protection element 22 is fixed to the substrate 20 through the pad 201.
  • the substrate 20 is a printed circuit board
  • the pad 201 is connected to the ground through a circuit in the printed circuit board; if the substrate 20 is another non-circuit board structure, such as an insulating substrate, by bonding to the insulating substrate
  • the flexible circuit board is connected to the pad 201 to connect the pad 201 to the ground through the flexible circuit board.
  • the ground here includes the ground of the biosensor chip 2, or the system ground or equipment ground to which the biosensor chip 2 is applied. In this manner, the static electricity of the human body is guided to the ground by the electrostatic protection element 22 and the connection line between the pad 201 and the ground.
  • the ESD protection element 22 includes a protrusion disposed on the substrate 20 and is directly or indirectly connected to the ground.
  • the ESD protection element 22 is directly connected to the ground through a connection line, or indirectly connected to the ground through other circuits.
  • electrostatic discharge is achieved.
  • the vertical height of the ESD protection element 22 relative to the substrate 20 is greater than the vertical height of the Wafer Die 21 relative to the substrate 20.
  • the convex portion has a sharp angle or an arc shape or an arch shape to use the lightning rod principle to electrostatically flow the object to the ground through the convex portion, thereby preventing static electricity from affecting the wafer die 21.
  • the protrusion of the electrostatic protection element 22 The top surface of the portion exceeds the upper surface of the wafer die 21.
  • the upper surface of the wafer die 21 is a surface adjacent to the user for receiving a user's touch or proximity input.
  • FIG. 4 is a schematic structural view of an electrostatic protection component of the biosensor chip of the present invention.
  • the electrostatic protection element 22 is, for example, a wire.
  • the raised portion of the static electricity protection element 22 is formed, for example, by wire bonding.
  • the wires for the ESD protection component 22 are metal wires, the material of which is, for example, gold, copper, aluminum, etc., and of course other suitable electrically conductive materials.
  • the electrostatic protection element 22 through the wire structure is not only simple in structure, but also has a small amount of material, thereby reducing material cost.
  • the electrostatic protection component 22 can be realized by wire bonding, and the manufacturing process is simple and quick, and is easy to implement.
  • the substrate 20 is provided with a first pad 201a and a second pad 201b, a third pad 201c, and a fourth pad 201d.
  • One end of the first conductive line is connected to the first pad 201a by wire bonding, and the other end of the first conductive line is connected to the second pad 201b, thereby forming the static electricity protection element 22a.
  • the first conductive line has an arc shape, and a maximum value h1 of the vertical height of the first conductive line relative to the substrate 20 is greater than a vertical height h2 of the wafer die 21 relative to the substrate 20.
  • One end of the second conductive line is connected to the third pad 201c by wire bonding, and the other end of the second conductive line is connected to the fourth pad 201d, thereby forming the static electricity protection element 22b.
  • the second conductive line also has a curvature, and the maximum height of the second conductive line relative to the vertical height of the substrate 20 is greater than the vertical height of the wafer die 21 relative to the substrate 20.
  • the vertical height of the static electricity protection element 22a with respect to the substrate 20 and the vertical height of the static electricity protection element 22b with respect to the substrate 20 are equal or within an allowable deviation range.
  • the material of the pad includes, for example, one or more of aluminum, copper, gold, silver, platinum, palladium, nickel, and the like.
  • the pad material can also be other suitable materials.
  • the ESD protection elements 22 are disposed on the outside of the wafer die. If there are two ESD elements 22, the two ESD elements 22 can be disposed on the same side or different sides of the wafer die 21, such as opposite sides or adjacent sides of the wafer die.
  • FIG. 5a is a schematic diagram of a distribution structure of two electrostatic protection components in the biosensor chip of the present invention
  • FIG. 5b is another of the two electrostatic protection components in the biosensor chip of the present invention
  • FIG. 5c is a schematic diagram of another distribution structure of two electrostatic protection elements in the biosensor chip of the present invention.
  • the projection surface of the wafer die 21 on the substrate 20 is quadrangular.
  • the projection surface of the wafer die 21 on the substrate 20 may have other shapes, such as a triangle, a polygon, a circle, Oval and so on.
  • the wafer die 21 includes a first side 21a and a second side 21b disposed opposite to each other, and a third side 21c and a fourth side 21d disposed opposite to each other, the electrostatic protection element 22a And the static electricity protection element 22b are both disposed on the first side 21a of the wafer die 21. It can be understood that the static electricity protection element 22a and the static electricity protection element 22b can also be disposed on the second side 21b, the third side 21c and the fourth side 21d of the wafer die 21.
  • the static electricity protection element 22a is disposed on the first side 21a of the wafer die 21, and the static electricity protection element 22b is disposed on the second side 21b of the wafer die 21. It can be understood that the ESD protection component 22a and the ESD protection component 22b can also be disposed on the third side 21c and the fourth side 21d of the wafer die 21.
  • the structure is compact and compact, and does not affect the wiring trace between the wafer die 21 and the substrate 20.
  • the static electricity protection element 22a is disposed at a corner formed by the first side 21a and the third side 21c of the wafer die 21, and the static electricity protection element 22b is disposed on the second side 21b of the wafer die 21 and The corner formed by the four sides 21d.
  • one end of the ESD protection element 22a is disposed on the first side 21a of the die dies 21, the other end of the ESD protection component 22a is disposed on the third side 21c of the die dies 21, and one end of the ESD protection component 22b is disposed on the wafer.
  • the second side 21b of the die 21, the other end of the static electricity protection element 22b is disposed on the fourth side 21d of the wafer die 21. It can be understood that the ESD protection element 22a and the ESD protection element 22b can also be disposed at the other two opposite corners of the wafer die 21.
  • the purpose of electrostatic discharge can be achieved even if the touch position of the biosensor chip 2 is deviated.
  • the above-mentioned static electricity protection elements 22 may be disposed in four, that is, correspondingly disposed on the first side, the second side, the third side, and the fourth side of the wafer die 21, or correspondingly disposed on the bare wafer.
  • the ESD protection elements 22 can also be disposed in other numbers and distributed around the wafer die 21 in a regular or irregular distribution rule to achieve a better electrostatic discharge effect. For example, it is evenly distributed outside the wafer die 21. In other words, as long as the position on which the electrostatic protection element can be disposed on the substrate 20 can be set to improve the electrostatic discharge effect.
  • the linear distances of the two pads for fixing the ESD protection member 22 on the substrate 20 may be equal, and may of course not be equal. As shown in FIG. 3, the linear distance L1 between the first pad 201a and the second pad 201b is equal to the linear distance L2 between the third pad 201c and the fourth pad 201d. If the ESD element 22 is a wire, since the wire is thin and the strength is limited, the strength of the ESD element 22 can be enhanced by providing a short linear distance, and the length of the wire is also saved. In addition, a larger number of ESD components can be placed on the same substrate.
  • FIG. 6 is a schematic structural diagram of a biosensor chip according to another embodiment of the present invention.
  • the biosensor chip 2 further includes a package body 23 for packaging the wafer die 21 and electrostatic protection.
  • the material of the package 23 is, for example, an epoxy resin material or other suitable insulating material.
  • the manufacturing process of the biosensor chip is, for example, S1, forming a wafer die independently according to a predetermined circuit structure; S2, providing a substrate 20 on which the position of the wafer die 21 is reserved, and At least two pads are disposed outside the reserved position; S3, the die dies 21 are correspondingly mounted on the substrate 20 at a specified position, and the die dies 21 are electrically connected to the substrate 20 through the conductive lines 202; S4 The two ends of the ESD protection device 22 are connected to the two pads by wire bonding, and the height of the ESD protection component 22 relative to the substrate 20 is greater than the height of the die die 21 relative to the substrate 20; S5, the wafer will be carried
  • the substrate 20 of the die 21 and the static electricity protection element 22 is placed in an injection mold containing an epoxy resin material; S6, the wafer die 21 and the static electricity protection element 22 in the mold cavity are molded by mold clamping.
  • the plastic molding method is, for example, T mold or C mold.
  • the manufacturing process of the biosensor chip 2 of the present invention is not limited to the steps listed above and the order between the steps, and may be other suitable steps.
  • the package of the biosensor chip 2 is packaged in an LGA, BGA or the like, for example.
  • other similar packaging methods can be used.
  • the package body 23 in the biosensor chip 2 has a certain height to mold the wafer die 21 and the static electricity protection component 22.
  • the package surface of the package 23 can also be substantially flush with the top of the electrostatic protection element 22. That is, the package height of the package 23 is equal to or slightly larger than the height of the electrostatic protection element 22.
  • the side surface S of the package body 23 away from the substrate 20 is used to receive a contact or proximity input of the object, and the side surface S is defined as a sensing surface.
  • the ESD protection element 22 is closer to the object relative to the wafer die 21, so static electricity generated by the object will be directed to the ground through the ESD protection element 22, thereby preventing static electricity from entering the Wafer die 21 Damage to the wafer die.
  • the number of the wafer dies 21 in the package body 23 may be one or two or more to achieve the corresponding functions.
  • the static electricity protection element 22 may be disposed for each of the wafer dies 21, or the plurality of wafer dies 21 may share the same static electricity protection element 22.
  • FIG. 7 is a structure of an embodiment of a wafer die in the biosensor chip of the present invention.
  • the wafer die 21 includes a substrate 210 and a sensing unit 211 and a detecting circuit 212 formed on the substrate 210.
  • the sensing unit 211 operates under the driving of the detecting circuit 212 to perform information sensing on the contact object.
  • the sensing unit 211 includes, for example, one or more of an optical sensing unit, a capacitive sensing unit, and an ultrasonic sensing unit.
  • the sensing unit 211 is of an array structure and includes a plurality of sensing devices arranged in a regular order, such as a matrix arrangement. Further, the sensing unit 211 further includes a corresponding sensor and multiple sensors
  • the electrically connected circuit is electrically connected to the detecting circuit 212.
  • the substrate 210 is a semiconductor substrate such as a silicon substrate or other suitable substrate.
  • the wafer die 21 is formed by forming the sensing unit 211 and the detecting circuit 212 on the semiconductor substrate. The wafer die is separately fabricated and then mounted on the substrate 20.
  • FIG. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
  • An electronic device 3 according to an embodiment of the present invention includes the biosensor chip 2 of any of the above embodiments, not only to sense object information contacting or approaching the biosensor chip 2, but also to implement an object The generated static electricity is discharged for the purpose.
  • the electronic device 3 is, for example, a consumer electronic product or a home-based electronic product or a vehicle-mounted electronic product.
  • consumer electronic products such as mobile phones, tablets, notebook computers, desktop monitors, computer integrated machines and other electronic products using biometric identification technology.
  • Home-based electronic products such as smart door locks, televisions, refrigerators, wearable devices and other electronic products that use biometric technology.
  • Vehicle-mounted electronic products such as car navigation systems, car DVDs, etc.
  • the electronic device 3 is a mobile phone, and a front surface of the mobile phone is provided with a touch screen and a display device 31 , and the bio sensor chip 2 is disposed under the front cover of the electronic device 3 .
  • the biosensor chip 2 can also be disposed on the touch screen and the display device 31.
  • the bio-sensing chip 2 can also be disposed at a suitable position on the front, the back, and the side of the electronic device 3, and can expose the outer surface of the electronic device 3, for example, in the opening of the electronic device casing. It may also be disposed inside the electronic device 3 and adjacent to the outer casing, for example, on the inner side of the outer casing.

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Abstract

一种生物传感芯片(2)及电子设备(3)，该生物传感芯片(2)包括：基板(20)以及设置于所述基板(20)上的晶圆裸片(21)、至少一静电防护元件(22)；所述静电防护元件(22)位于所述晶圆裸片(21)的外侧，而且所述静电防护元件(22)相对于所述基板(20)的垂直高度(h1)大于晶圆裸片(21)相对于所述基板(20)的垂直高度(h2)，所述静电防护元件(22)用于将静电进行泄放。该电子设备(3)包括上述生物传感芯片(2)。

Description

生物传感芯片及电子设备 技术领域
本实用新型涉及一种防静电的生物传感芯片及电子设备。
背景技术
顾名思义，生物传感芯片用于在用户接触或接近时，对接触物体的生物特征信息进行感测。例如指纹传感器，能对接触或接近该传感器的物体进行感测，并获得指纹图像。
然而，人体为导体，在用户接触或接触该传感器时，人体静电会对传感器中的电路造成影响，导致该生物传感芯片感测效率降低甚至失效。
实用新型内容
本实用新型实施方式旨在至少解决现有技术中存在的技术问题之一。为此，本实用新型实施方式需要提供一种生物传感芯片及电子设备。
本实用新型实施方式的一种生物传感芯片，包括：基板以及设置于所述基板上的晶圆裸片、静电防护元件，所述静电防护元件位于所述晶圆裸片的外侧，而且所述静电防护元件相对于所述基板的垂直高度大于晶圆裸片相对于所述基板的垂直高度，所述静电防护元件用于将静电进行泄放。
本实用新型实施方式通过将静电防护元件设置于基板上，且位于晶圆裸片的外侧，同时静电防护元件的垂直高度还大于晶圆裸片的垂直高度，因此当物体接触该生物传感芯片时，静电防护元件相对晶圆裸片更靠近物体，物体产生的静电先通过静电防护元件进行泄放，从而避免了静电经过晶圆裸片而对晶圆裸片造成影响。另外，由于静电防护元件位于晶圆裸片的外侧，从而该静电防护元件不会影响晶圆裸片的生物感测，从而提高了生物感测效果。再者，由于静电防护元件通过高度设置来实现静电泄放，因此该静电防护元件能设置为较小体积的导电件，从而节省了生物传感芯片的制造成本。
在某些实施方式中，所述静电防护元件为导线。通过导线结构的静电防护元件不但结构简单，而且材料用量少，从而减少材料成本。另外，该导线结构的静电防护元件位于晶圆裸片的外侧，不但不影响晶圆裸片的正常线路，而且设置于晶圆裸片外侧的导线，可以实现短距离设计以及提高导线的支撑强度。
在某些实施方式中，所述静电防护元件通过打线的方式设置于所述基板上。通过打线的方式实现静电防护元件，制作工艺简单快捷，而且易于实现。
在某些实施方式中，所述晶圆裸片在基板上的投影面为四边形，所述静电防护元件包括两个，该两个静电防护元件设于所述晶圆裸片的同一侧，或者对应设于所述晶圆裸片的相对两侧。如此，不但简化了静电防护元件的设置结构，而且还提高了静电泄放效果。
在某些实施方式中，所述静电防护元件包括多个，且分布于所述晶圆裸片的四周。如此，即使物体偏离接触生物传感芯片，静电防护元件都能将静电更快地引导至地，从而提高了静电泄放效果。
在某些实施方式中，所述基板上对应每个所述静电防护元件设有两个焊盘，该静电防护元件一端连接于一焊盘，静电防护元件另一端连接于另一焊盘。
在某些实施方式中，若所述基板为印刷电路板，则所述静电防护元件通过印刷电路板上的电路连接至地；若所述基板为绝缘基板，则静电防护元件通过绑定于所述绝缘基板上的柔性电路板连接至地。
在某些实施方式中，所述静电防护元件直接或间接连接于地。
在某些实施方式中，所述生物传感芯片还包括封装体，用于封装所述晶圆裸片、静电防护元件，以及填充所述晶圆裸片与所述静电防护元件之间的间隙。
在某些实施方式中，所述封装体远离所述基板的一侧表面用于接收物体的接触或接近输入，且所述晶圆裸片用于对接触或接近的物体进行信息感测。
在某些实施方式中，所述晶圆裸片感测的物体信息包括指纹、掌纹、耳纹、心率、血氧、血压、静脉中的一个或多个。
在某些实施方式中，所述生物传感芯片为光学式传感芯片、电容式传感芯片、超声波式传感芯片中的一个或多个。
在某些实施方式中，所述晶圆裸片为至少一个。
在某些实施方式中，所述静电防护元件呈拱形，所述拱形的顶端表面超过所述晶圆裸片的上表面。
在某些实施方式中，所述静电防护元件相对于所述基板的最高的垂直高度大于晶圆裸片相对于所述基板的垂直高度。
本实用新型实施方式还提供了一种电子设备，包括外壳以及设置于外壳开孔内或外壳内侧的生物传感芯片，且所述生物传感芯片为上述任意一实施方式所述的生物传感芯片。因此具有上述生物传感芯片的所有有益效果。
本实用新型实施方式的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本实用新型实施方式的实践了解到。
附图说明
本实用新型实施方式的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1为现有的一种生物传感芯片的安装结构示意图；
图2为现有的另一种生物传感芯片的封装结构示意图；
图3为本实用新型一实施方式的生物传感芯片的侧面结构示意图；
图4为本实用新型生物传感芯片的静电防护元件的一种结构示意图；
图5a为本实用新型生物传感芯片中两个静电防护元件的一种分布结构示意图；
图5b为本实用新型生物传感芯片中两个静电防护元件的另一种分布结构示意图；
图5c为本实用新型生物传感芯片中两个静电防护元件的又一种分布结构示意图；
图6为本实用新型另一实施方式的生物传感芯片的结构示意图；
图7为本实用新型生物传感芯片中晶圆裸片一实施方式的结构；
图8为本实用新型一实施方式的电子设备的结构示意图。
具体实施方式
下面详细描述本实用新型的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本实用新型，而不能理解为对本实用新型的限制。
在本实用新型的描述中，需要理解的是，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本实用新型的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定，对应地，该定义适用于“多种”、“多条”等术语。“接触”或“触摸”包括直接接触或间接接触。
在本实用新型的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通信；可以是直接相连，也可以 通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本实用新型中的具体含义。
下文的公开提供了许多不同的实施方式或例子用来实现本实用新型的不同结构。为了简化本实用新型的公开，下文中对特定例子的部件和设定进行描述。当然，它们仅仅为示例，并且目的不在于限制本实用新型。此外，本实用新型可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设定之间的关系。此外，本实用新型提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
进一步地，所描述的特征、结构可以以任何合适的方式结合在一个或更多实施方式中。在下面的描述中，提供许多具体细节从而给出对本实用新型的实施方式的充分理解。然而，本领域技术人员应意识到，没有所述特定细节中的一个或更多，或者采用其它的结构、组元等，也可以实践本实用新型的技术方案。在其它情况下，不详细示出或描述公知结构或者操作以避免模糊本实用新型。
本实用新型提出的生物传感芯片用于感测物体的指纹、掌纹、耳纹、心率、血氧、血压、静脉中一个或多个。该生物传感芯片包括光学式传感芯片、电容式传感芯片、超声波传感芯片中的一种或多种。
参照图1，图1为现有的一种生物传感芯片的安装结构示意图。该生物传感芯片10在进行模组安装时，设置一金属环11，该金属环11通过导通线路12与地连接；而且该金属环11设有一中心孔，生物传感芯片10位于该金属环11的中心孔内。当用户接触或接近该生物传感芯片10时，人体静电将通过金属环11引导至地以进行泄放，从而避免人体静电流向生物传感芯片10而损坏生物传感芯片10。
参照图2，图2为现有的另一种生物传感芯片的封装结构示意图。该生物传感芯片10＇包括封装壳体13以及位于封装壳体13内的传感裸片14以及电路保护器件15，该电路保护器件15例如TVS(Transient Voltage Suppressor)二极管，当手指接触或接近该生物传感芯片10时，人体静电将通过该电路保护器件15的钳制，从而保护后面的电路元件，即传感裸片14，不受静电的损害。
虽然通过设置金属环11和电路保护器件15均能解决静电问题，但是设置金属环11和电路保护器件15都将增加生物传感芯片10、10＇的制造成本，如此本实用新型提出了一种具有新型静电防护结构的生物传感芯片，能降低生物传感芯片10的制造成本。
参照图3，图3为本实用新型一实施方式的生物传感芯片的侧面结构示意图。本实 用新型提出生物传感芯片2包括一基板20以及设置于该基板20上的晶圆裸片21、静电防护元件22，且静电防护元件22相对于基板20的垂直高度h1大于晶圆裸片21相对于基板20的垂直高度h2。
本实用新型实施方式相对于现有技术具有如下优点：
一、通过将静电防护元件设置于基板上，且静电防护元件的垂直高度还大于晶圆裸片的垂直高度，因此当物体接触该生物传感芯片时，静电防护元件相对晶圆裸片更靠近物体，物体产生的静电先通过静电防护元件进行泄放，从而避免了静电经过晶圆裸片而对晶圆裸片造成影响。
二、由于静电防护元件位于晶圆裸片的外侧，从而该静电防护元件不会影响晶圆裸片的生物感测，从而提高了生物感测效果。
三、由于静电防护元件通过高度设置来实现静电泄放，因此该静电防护元件能设置为较小体积的导电件，从而节省了生物传感芯片的制造成本。
在某些实施方式中，该基板20可包括透明基板和非透明基板两种，其中透明基板例如但不限于玻璃基板、塑料基板、水晶、蓝宝石等绝缘基板，非透明基板例如但不限于硅基板、印刷电路板、金属基板等。另外，该基板20可以为刚性材质，也可以为柔性材质，例如柔性薄膜。
在某些实施方式中，晶圆裸片21设置于基板20上后，晶圆裸片21通过导电线路202与基板20连接。
进一步地，该基板20上设置焊盘201，静电防护元件22通过焊盘201固定于基板20上。若该基板20为印刷电路板，则通过印刷电路板中的电路将焊盘201连接至地；若该基板20为其他非电路板结构，例如绝缘基板，则通过绑定于该绝缘基板上的柔性电路板与焊盘201连接，以将焊盘201通过柔性电路板连接至地。需要说明的是，这里的地包括生物传感芯片2的地，或者生物传感芯片2所应用的系统地或设备地。如此，通过静电防护元件22以及焊盘201与地之间的连接线路，将人体静电引导至地进行泄放。
进一步地，该静电防护元件22包括设置于基板20上的凸起部，并直接或间接连接于地，例如，该静电防护元件22通过连接线路直接与地连接，或者通过其他电路与地间接连接，以将静电防护元件22上接收到的静电传导至地，实现静电泄放。该静电防护元件22相对于基板20的垂直高度大于晶圆裸片21相对于基板20的垂直高度。
进一步地，该凸起部呈尖角或弧形或拱形，以利用避雷针原理将物体静电经凸起部流向地，从而防止静电对晶圆裸片21造成影响。较佳地，所述静电防护元件22的凸起 部的顶端表面超过晶圆裸片21的上表面。所述晶圆裸片21的上表面即为邻近用户的表面，用于接收用户的触摸或接近输入。
在某些实施方式中，参照图4，图4为本实用新型生物传感芯片的静电防护元件的一种结构示意图。该静电防护元件22例如为导线。静电防护元件22的凸起部例如通过打线形成。在某些实施方式中，用于静电防护元件22的导线为金属线，该金属线的材料例如为金、铜、铝等，当然还可以为其他合适的导电材料。通过导线结构的静电防护元件22不但结构简单，而且材料用量少，从而减少材料成本。另外，该静电防护元件22通过打线的方式即可实现，制作工艺简单快捷，而且易于实现。
具体地，继续参照图4，需要说明的是，图4中示出了两个静电防护元件22，当然也可以仅设置一个静电防护元件22，或者设置两个以上静电防护元件22。如图4所示，该基板20上设有第一焊盘201a和第二焊盘201b、第三焊盘201c、第四焊盘201d。通过打线的方式将第一导电线的一端连接至第一焊盘201a，第一导电线的另一端连接至第二焊盘201b，从而形成静电防护元件22a。该第一导电线呈一弧形，且该第一导电线相对于基板20的垂直高度的最大值h1大于晶圆裸片21相对于基板20的垂直高度h2。通过打线的方式将第二导电线的一端连接至第三焊盘201c，第二导电线的另一端连接至第四焊盘201d，从而形成静电防护元件22b。该第二导电线也呈一弧度，且该第二导电线相对于基板20的垂直高度的最大值大于晶圆裸片21相对于基板20的垂直高度。在本实施方式中，静电防护元件22a相对于基板20的垂直高度和静电防护元件22b相对于基板20的垂直高度相等或者在允许的偏差范围内。当然，也可以设置为高度不同的静电防护元件22。
在某些实施方式中，焊盘的材料例如包括铝、铜、金、银、铂、钯、镍等中的一种或两种以上。当然，焊盘材料还可以为其他合适的材料。
进一步地，在某些实施方式中，静电防护元件22均设置于晶圆裸片的外侧。若静电防护元件22为两个，该两个静电防护元件22可以设置在晶圆裸片21的同一侧或不同侧，例如晶圆裸片的相对两侧或者相邻两侧。参照图5a及图5b，图5a为本实用新型的生物传感芯片中两个静电防护元件的一种分布结构示意图；图5b为本实用新型的生物传感芯片中两个静电防护元件的另一种分布结构示意图；图5c为本实用新型的生物传感芯片中两个静电防护元件的又一种分布结构示意图。如图5a所示，该晶圆裸片21在基板20上的投影面为四边形，当然，晶圆裸片21在基板20上的投影面还可以为其他形状，例如三角形、多边形、圆形、椭圆形等等。该晶圆裸片21包括相对设置的第一侧21a和第二侧21b，以及相对设置的第三侧21c和第四侧21d，静电防护元件22a 和静电防护元件22b均设置于晶圆裸片21的第一侧21a。可以理解的是，该静电防护元件22a和静电防护元件22b也可以设置于晶圆裸片21的第二侧21b、第三侧21c和第四侧21d。
如图5b所示，静电防护元件22a设置于晶圆裸片21的第一侧21a，静电防护元件22b设置于晶圆裸片21的第二侧21b。可以理解的是，该静电防护元件22a和静电防护元件22b也可以对应设置于晶圆裸片21的第三侧21c和第四侧21d。
通过将静电防护元件设置于晶圆裸片21的同一侧，结构简洁紧凑，而且不会影响晶圆裸片21与基板20之间的导线线路。
如图5c所示，静电防护元件22a设置于晶圆裸片21的第一侧21a和第三侧21c形成的拐角处，静电防护元件22b设置于晶圆裸片21的第二侧21b和第四侧21d形成的拐角处。具体地，该静电防护元件22a一端设置于晶圆裸片21的第一侧21a，静电防护元件22a另一端设置于晶圆裸片21的第三侧21c；静电防护元件22b一端设置于晶圆裸片21的第二侧21b，静电防护元件22b另一端设置于晶圆裸片21的第四侧21d。可以理解的是，该静电防护元件22a和静电防护元件22b也可以设置在晶圆裸片21的另外两个相对的拐角处。
通过相对设置的静电防护元件22a和静电防护元件22b，使得即使偏离生物传感芯片2的触摸位置，也能达到静电泄放的目的。
当然，可变更地，上述静电防护元件22可以设置为4个，即对应设置在晶圆裸片21的第一侧、第二侧、第三侧和第四侧，或者对应设置在晶圆裸片21的四个拐角处。
在某些实施方式中，静电防护元件22还可以设置为其他数量，且按照规则或不规则的分布规则分布于晶圆裸片21的四周，以实现更好的静电泄放效果。例如，均匀分布于晶圆裸片21的外侧。换句话说，只要基板20上能设置静电防护元件的位置均可以进行设置，以提高静电泄放效果。
在某些实施方式中，当静电防护元件22包括至少两个时，用于固定静电防护元件22的两个焊盘在基板20上的直线距离可以相等，当然也可以不相等。如图3所示，第一焊盘201a和第二焊盘201b之间的直线距离L1，与第三焊盘201c和第四焊盘201d之间的直线距离L2相等。若静电防护元件22为导线，由于导线较细，且强度有限，因此通过设置较短的直线距离，可以加强该静电防护元件22的强度，同时还节省了导线的长度。另外，还可以在同一基板上设置更多数量的静电防护元件。
进一步地，参照图6，图6为本实用新型另一实施方式的生物传感芯片的结构示意图。上述生物传感芯片2还包括封装体23，该封装体23用于封装晶圆裸片21、静电防 护元件22，以及填充晶圆裸片21与静电防护元件22之间的间隙。该封装体23的材料例如为环氧树脂类材料或其他合适的绝缘材料。
该生物传感芯片的制作过程例如为：S1、按照预定的电路结构独立制成晶圆裸片；S2、提供一基板20，该基板20上预留有晶圆裸片21的位置，且在该预留位置外侧设置至少两个焊盘；S3、将晶圆裸片21对应贴装于基板20的指定位置，并通过导电线路202使得晶圆裸片21与基板20形成电性连接；S4、通过打线的方式将静电防护元件22两端连接至两焊盘上，且静电防护元件22相对于基板20的高度大于晶圆裸片21相对于基板20的高度；S5、将承载晶圆裸片21和静电防护元件22的基板20放置于装有环氧树脂类材料的注塑模具中；S6、通过合模以对模具腔内的晶圆裸片21以及静电防护元件22进行塑封成型。该塑封成型方式例如采用T mold或C mold。
然，可变更地，本实用新型生物传感芯片2的制作过程不局限于上述列出的步骤以及步骤之间的顺序，还可以是其他合适的步骤。
在某些实施方式中，上述生物传感芯片2的封装例如采用LGA、BGA等封装方式。然，可变更地，还可以采用其他相似的封装方式。
需要说明的是，上述生物传感芯片2中的封装体23具有一定的高度，以将晶圆裸片21和静电防护元件22进行塑封。当然，可变更地是，封装体23的封装面也可以与静电防护元件22的顶部基本齐平。即封装体23的封装高度等于或略大于静电防护元件22的高度。
进一步地，上述封装体23远离基板20的一侧表面S用于接收物体的接触或接近输入，定义该侧表面S为感测面。当物体接触或接近该感测面时，静电防护元件22相对晶圆裸片21更加接近物体，因此物体产生的静电将通过静电防护元件22引导至地，从而避免了静电进入晶圆裸片21而对晶圆裸片造成损害。
在某些实施方式中，上述封装体23内的晶圆裸片21可以为一个，也可以为两个或多个，以实现相应的功能。对应地，可以针对每个晶圆裸片21来设置静电防护元件22，也可以多个晶圆裸片21共用同一静电防护元件22。
进一步地，参照图7，图7为本实用新型生物传感芯片中晶圆裸片一实施方式的结构。该晶圆裸片21包括衬底210以及形成在衬底210上的传感单元211和检测电路212，传感单元211在检测电路212的驱动下进行工作，以对接触物体进行信息感测。以生物特征信息为例，该传感单元211例如包括光学传感单元、电容传感单元、超声波传感单元中的一种或多种。该传感单元211为阵列结构，包括多个传感器件，该多个传感器件按一定规则排列，例如矩阵排列。进一步地，该传感单元211还包括对应与多个传感器 件电性连接的线路，该线路对应与检测电路212电性连接。
进一步地，上述衬底210为半导体衬底，例如硅基板或其他合适的基板。通过在该半导体衬底上形成传感单元211和检测电路212，从而形成晶圆裸片21。该晶圆裸片独立制作后，再贴装于基板20上。
进一步地，请参图8，图8为本实用新型一实施方式的电子设备的结构示意图。本实用新型实施方式的一种电子设备3，包括如上任一实施方式的生物传感芯片2，不但实现对接触或接近该生物传感芯片2的物体信息进行感测，而且还实现了对物体产生的静电进行泄放的目的。
具体地，电子设备3如为消费性电子产品或家居式电子产品或车载式电子产品。其中，消费性电子产品如为手机、平板电脑、笔记本电脑、桌面显示器、电脑一体机等各类应用生物识别技术的电子产品。家居式电子产品如为智能门锁、电视、冰箱、穿戴式设备等各类应用生物识别技术的电子产品。车载式电子产品如为车载导航仪、车载DVD等。
在图8的示例中，电子设备3为手机，手机的正面设置有触摸屏及显示装置31，生物传感芯片2设置在电子设备3的前盖板下方。然，可变更地，在其它实施方式中，所述生物传感芯片2也可设置在触摸屏及显示装置31上。另外，所述生物传感芯片2还可对应设置在电子设备3的正面、背面、以及侧面等合适位置，且，既可曝露出电子设备3的外表面，例如电子设备外壳的开孔内，也可设置在电子设备3内部并邻近外壳，例如位于外壳的内侧。
在本说明书的描述中，参考术语“一个实施方式”、“某些实施方式”、“示意性实施方式”、“示例”、“具体示例”、或“一些示例”等的描述意指结合所述实施方式或示例描述的具体特征、结构、材料或者特点包含于本实用新型的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。
尽管上面已经示出和描述了本实用新型的实施方式，可以理解的是，上述实施方式是示例性的，不能理解为对本实用新型的限制，本领域的普通技术人员在本实用新型的范围内可以对上述实施方式进行变化、修改、替换和变型。

Claims (16)

  1. 一种生物传感芯片，包括：基板以及设置于所述基板上的晶圆裸片、至少一静电防护元件；所述静电防护元件位于所述晶圆裸片的外侧，而且所述静电防护元件相对于所述基板的垂直高度大于晶圆裸片相对于所述基板的垂直高度，所述静电防护元件用于将静电进行泄放。
  2. 如权利要求1所述的生物传感芯片，其特征在于：所述静电防护元件为导线。
  3. 如权利要求2所述的生物传感芯片，其特征在于：所述静电防护元件通过打线的方式设置于所述基板上。
  4. 如权利要求1所述的生物传感芯片，其特征在于：所述晶圆裸片在基板上的投影面为四边形，所述静电防护元件包括两个，该两个静电防护元件设于所述晶圆裸片的同一侧，或者所述晶圆裸片的不同侧。
  5. 如权利要求1所述的生物传感芯片，其特征在于：所述静电防护元件包括多个，且分布于所述晶圆裸片的四周。
  6. 如权利要求4或5所述的生物传感芯片，其特征在于：所述基板上对应每个所述静电防护元件设有两个焊盘，该静电防护元件一端连接于一焊盘，静电防护元件另一端连接于另一焊盘。
  7. 如权利要求1所述的生物传感芯片，其特征在于：若所述基板为印刷电路板，则所述静电防护元件通过印刷电路板上的电路连接至地；若所述基板为绝缘基板，则静电防护元件通过绑定于所述绝缘基板上的柔性电路板连接至地。
  8. 如权利要求7所述的生物传感芯片，其特征在于：所述静电防护元件直接或间接连接于地。
  9. 如权利要求1所述的生物传感芯片，其特征在于：所述生物传感芯片还包括封装体，用于封装所述晶圆裸片、静电防护元件，以及填充所述晶圆裸片与所述静电防护元件之间的间隙。
  10. 如权利要求9所述的生物传感芯片，其特征在于：所述封装体远离所述基板的一侧表面用于接收物体的接触或接近输入，且所述晶圆裸片用于对接触或接近的物体进行信息感测。
  11. 如权利要求10所述的生物传感芯片，其特征在于：所述晶圆裸片感测的物体信息包括指纹、掌纹、耳纹、心率、血氧、血压、静脉中的一个或多个。
  12. 如权利要求1所述的生物传感芯片，其特征在于：所述生物传感芯片为光学式传感 芯片、电容式传感芯片、超声波式传感芯片中的一个或多个。
  13. 如权利要求1所述的生物传感芯片，其特征在于：所述晶圆裸片为至少一个。
  14. 如权利要求1所述的生物传感芯片，其特征在于：所述静电防护元件呈拱形，所述拱形的顶端表面超过所述晶圆裸片的上表面。
  15. 如权利要求1所述的生物传感芯片，其特征在于：所述静电防护元件相对于所述基板的最高的垂直高度大于晶圆裸片相对于所述基板的垂直高度。
  16. 一种电子设备，其特征在于：包括外壳以及设置于外壳开孔内或外壳内侧的生物传感芯片，且所述生物传感芯片为权利要求1-15中任意一项所述的生物传感芯片。
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