WO2009081763A1 - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- WO2009081763A1 WO2009081763A1 PCT/JP2008/072636 JP2008072636W WO2009081763A1 WO 2009081763 A1 WO2009081763 A1 WO 2009081763A1 JP 2008072636 W JP2008072636 W JP 2008072636W WO 2009081763 A1 WO2009081763 A1 WO 2009081763A1
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00015—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems
- B81C1/00261—Processes for packaging MEMS devices
- B81C1/00317—Packaging optical devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
- H01L27/14618—Containers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14683—Processes or apparatus peculiar to the manufacture or treatment of these devices or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C2201/00—Manufacture or treatment of microstructural devices or systems
- B81C2201/01—Manufacture or treatment of microstructural devices or systems in or on a substrate
- B81C2201/0101—Shaping material; Structuring the bulk substrate or layers on the substrate; Film patterning
- B81C2201/0102—Surface micromachining
- B81C2201/0104—Chemical-mechanical polishing [CMP]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C2201/00—Manufacture or treatment of microstructural devices or systems
- B81C2201/01—Manufacture or treatment of microstructural devices or systems in or on a substrate
- B81C2201/0101—Shaping material; Structuring the bulk substrate or layers on the substrate; Film patterning
- B81C2201/0102—Surface micromachining
- B81C2201/0105—Sacrificial layer
- B81C2201/0108—Sacrificial polymer, ashing of organics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C2201/00—Manufacture or treatment of microstructural devices or systems
- B81C2201/01—Manufacture or treatment of microstructural devices or systems in or on a substrate
- B81C2201/0101—Shaping material; Structuring the bulk substrate or layers on the substrate; Film patterning
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- B81C2201/0125—Blanket removal, e.g. polishing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C2203/00—Forming microstructural systems
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- B81C2203/0118—Bonding a wafer on the substrate, i.e. where the cap consists of another wafer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
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- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the present invention relates to a semiconductor device capable of reducing the size and thickness of a package such as an image sensor or a micro electro mechanical system (MEMS) device, and a manufacturing method thereof.
- a semiconductor device capable of reducing the size and thickness of a package such as an image sensor or a micro electro mechanical system (MEMS) device, and a manufacturing method thereof.
- MEMS micro electro mechanical system
- Non-patent document 2 a method for forming a cavity in a wafer level package, a method has been proposed in which a pre-patterned photosensitive resin is used as an adhesive so that a portion without a resin forms a cavity after the substrates are bonded together.
- a first object of the present invention is to provide a semiconductor device manufacturing method capable of manufacturing a semiconductor device that can contribute to miniaturization of devices and electronic devices on which the devices are mounted by a simpler process.
- the present invention provides a semiconductor device in which unevenness and cracks due to the presence or absence of cavities are avoided and the substrate is more uniformly thinned, and can contribute to miniaturization of devices and electronic devices on which the devices are mounted. Is the second purpose.
- a first substrate having optical transparency and a second substrate having a functional element on one surface are bonded together so that the functional element faces the first substrate.
- the first substrate and the second substrate are supplied with a photosensitive resin at a bonding portion, and the photosensitive resin is exposed and cured.
- the through-hole forming step it is desirable to form the cavity by removing a predetermined portion of the cured photosensitive resin.
- the modified portion is formed by irradiating a predetermined position of the first substrate with a laser beam, and the modified portion is removed. It is desirable to form.
- the method for manufacturing a semiconductor device of the present invention it is preferable that the method further includes a sealing portion forming step of forming a sealing portion for hermetically sealing the cavity after the formation of the step through hole.
- a semiconductor device according to the present invention includes: a first substrate having optical transparency; a second substrate having a functional element on one surface and bonded so that the functional element faces the first substrate; and the first substrate.
- the functional element is preferably an image sensor.
- the functional element is preferably a pressure sensor element.
- the present invention after bonding the first substrate and the second substrate, at least one of the substrates is thinned, and then the cavity is formed.
- the occurrence of unevenness and cracks after grinding due to the presence or absence of cavities can be avoided, and a more uniform and thin wafer can be ground.
- the thickness of the package can be made thinner than before.
- the present invention the occurrence of unevenness and cracks due to the presence or absence of cavities is avoided, and the substrate is made thinner more uniformly. Accordingly, it is possible to provide a semiconductor device that can contribute to miniaturization of devices and electronic devices on which the devices are mounted.
- FIG. 1 is a cross-sectional view showing an example of a semiconductor device according to the present invention.
- 2A is a cross-sectional view showing a method of manufacturing the semiconductor device shown in FIG. 1 in the order of steps.
- 2B is a cross-sectional view showing the method of manufacturing the semiconductor device shown in FIG. 1 in the order of steps.
- 2C is a cross-sectional view showing a method of manufacturing the semiconductor device shown in FIG. 1 in the order of steps.
- 2D is a cross-sectional view showing a method of manufacturing the semiconductor device shown in FIG. 1 in the order of steps.
- 2E is a cross-sectional view showing the method of manufacturing the semiconductor device shown in FIG. 1 in the order of steps.
- FIG. 1 is a cross-sectional view showing an example of a semiconductor device according to the present invention.
- FIG. 3 is a schematic cross-sectional view showing another example of the semiconductor device according to the present invention.
- 4A is a cross-sectional view showing a method of manufacturing the semiconductor device shown in FIG. 3 in the order of steps.
- 4B is a cross-sectional view showing the method of manufacturing the semiconductor device shown in FIG. 3 in the order of steps.
- 4C is a cross-sectional view showing the method of manufacturing the semiconductor device shown in FIG. 3 in the order of steps.
- 4D is a cross-sectional view showing the method of manufacturing the semiconductor device shown in FIG. 3 in the order of steps.
- 4E is a cross-sectional view showing a method of manufacturing the semiconductor device shown in FIG. 3 in the order of steps.
- FIG. 1 is a schematic cross-sectional view showing an example of the semiconductor device of the present embodiment.
- the semiconductor device 1A (1) includes a first substrate 11 having optical transparency and a functional element 13 on one surface, and is bonded to the first substrate 11 so that the functional element 13 faces the first substrate 11.
- the second substrate 12 thus formed, a cavity 15 disposed in a bonding portion of the first substrate 11 and the second substrate 12 and corresponding to the functional element 13, and communicated with the cavity 15
- the disposed through hole 16 and a sealing portion 17 for sealing the cavity 15 and the through hole 16 are provided.
- the semiconductor device 1 ⁇ / b> A the first substrate 11 and the second substrate 12 are bonded together with a photosensitive resin 14.
- the semiconductor device 1A of the present invention the occurrence of irregularities and cracks due to the presence or absence of a cavity is avoided, and the substrate is thinned more uniformly. Thereby, it can contribute to size reduction of a device and the electronic device in which they are mounted.
- the first substrate 11 is not particularly limited, but suitable examples include a transparent substrate made of a semiconductor such as glass or silicon, a single crystal such as sapphire, a resin, or a composite material thereof.
- the first substrate 11 is preferably a glass substrate that is transparent in the visible region (for example, manufactured by Pyrex (registered trademark)) so that the semiconductor device 1A can be applied to an image sensor package.
- the thickness of the first substrate 11 is not particularly limited, but is preferably about 150 ⁇ m to 1 mm, for example.
- the second substrate 12 is made of, for example, a semiconductor substrate.
- the semiconductor substrate may be a semiconductor wafer such as a silicon wafer, or a semiconductor chip obtained by cutting (dicing) the semiconductor wafer into chip dimensions.
- the functional element 13 is mounted on the surface of the second substrate 12.
- a boron (boron) diffusion layer for electrically connecting the functional element 13 to an external electronic circuit or the like, and penetrating the front and back surfaces of the second substrate 12 are provided.
- a penetrating electrode is provided.
- the functional element 13 is an imaging element such as a CCD element or a pressure sensor element.
- Other examples of the functional element 13 include, for example, an IC chip, an optical element, a micro relay, a micro switch, an acceleration sensor, a high frequency filter, a micro mirror, a micro reactor, a ⁇ -TAS, a DNA chip, a MEMS device, and a micro fuel cell. Etc. can be used.
- a method for manufacturing such a semiconductor device 1A will be described.
- a first substrate 11 having optical transparency and a second substrate 12 having a functional element 13 on one surface are disposed so that the functional element 13 faces the first substrate 11.
- Steps ⁇ for forming a cavity 15 and a through hole 16 communicating with the cavity 15 in at least a part of the part are sequentially provided.
- substrate 12 are bonded together by supplying the photosensitive resin 14 to a bonding part, and exposing and hardening in a post process.
- a glass substrate (pyrex (registered trademark), 4 inches, thickness 500 ⁇ m) transparent in the visible region was used so as to be applicable to an image sensor package.
- a Si substrate (4 inches, thickness 525 ⁇ m) on which a MEMS device and an image sensor were arranged as the functional element 13 on one surface was used.
- one through hole 16 is formed in advance at a location where the cavity 15 is formed.
- the photosensitive resin 14 For example, a polyimide resin, an epoxy resin, a silicone resin etc. can be used.
- the method for applying the resin is not particularly limited, and for example, a method such as stamping, dispensing, spin coating, spray coating, or the like can be used.
- the photosensitive resin 14 a negative type that cures the exposed portion was used.
- step ⁇ at least one of the first substrate 11 and the second substrate 12 is thinned [step ⁇ ].
- the second substrate 12 is ground and thinned.
- the second substrate 12 Si substrate
- the second substrate 12 was mechanically ground and then polished, so that the thickness of the second substrate 12 was 100 ⁇ m.
- a cavity 15 is formed in at least a part of the bonded portion of the first substrate 11 and the second substrate 12 [step ⁇ ].
- the previously formed through hole 16 is in communication with the cavity 15.
- the cavity 15 is formed by removing a predetermined portion of the cured photosensitive resin 14.
- the photosensitive resin 14 is irradiated with light from the first substrate 11 side, exposed and cured.
- the photosensitive resin 14 where the cavity 15 is to be formed is not exposed (shown as a non-exposed portion 14a in the figure), and is removed by a chemical solution in a subsequent process. Thereby, this part can be used as the cavity 15.
- the reason for irradiating light from the first substrate 11 side is that the first substrate 11 is made of glass, so that the light is transmitted and the photosensitive resin 14 can be exposed.
- the resin in the non-exposed portion 14a is removed with a chemical solution to form a cavity 15.
- the through hole 16 formed in the first substrate 11 was used for introducing the chemical into the non-exposed portion 14a.
- the through hole 16 may be formed in the first substrate 11 in advance, or may be newly formed after the substrates are bonded together.
- a sealing portion 17 that hermetically seals the cavity 15 is formed [step ⁇ ].
- the through hole 16 may be closed with a sealing portion 17 made of low melting point glass or resin.
- the cavity 15 can be hermetically sealed.
- the second substrate 12 on the cavity 15 thinned by grinding can be used as a flexible diaphragm, and a new function such as pressure sensing can be added.
- the semiconductor device 1A as shown in FIG. 1 is obtained.
- the semiconductor device 1A thus obtained, the occurrence of irregularities and cracks due to the presence or absence of cavities is avoided, and the substrate is thinned more uniformly, thereby reducing the size of the devices and electronic devices on which they are mounted. Can contribute.
- the second substrate 12 and the first substrate 11 may be a combination other than the present embodiment, or may be Pyrex (registered trademark) substrates or other glass and Si wafers. Further, the thickness can be appropriately set to about 150 ⁇ m to 1 mm.
- the photosensitive resin 14 may also be a positive type resin whose exposed portion is removed by a chemical solution. Furthermore, there may be a plurality of through holes 16 for introducing the chemical solution.
- FIG. 3 is a schematic cross-sectional view showing an example of the semiconductor device of the present embodiment.
- the semiconductor device 1B (1) includes a light-transmitting first substrate 21 and a functional element 23 on one surface, and is bonded to the first substrate 21 so that the functional element 23 faces the first substrate 21.
- the second substrate 22 thus formed, a cavity 24 disposed in a portion corresponding to the functional element 23, which is a bonding portion of the first substrate 21 and the second substrate 22, and communicated with the cavity 24
- the disposed through hole 25 and a sealing portion 26 for sealing the cavity 24 and the through hole 25 are provided.
- the semiconductor device 1B of the present invention avoids the occurrence of unevenness and cracks due to the presence or absence of the cavity 24, and the substrate is thinned more uniformly, thereby contributing to the downsizing of the device and the electronic equipment on which the device is mounted. can do.
- substrate 22, and the functional element 13 mentioned above can be used for the 1st board
- a method for manufacturing such a semiconductor device 1B will be described.
- a first substrate 21 having optical transparency and a second substrate 22 having a functional element 23 on one surface are arranged so that the functional element 23 faces the first substrate 21.
- Bonding step ⁇ , step ⁇ for thinning at least one of the first substrate 21 and the second substrate 22 (here, the second substrate 22), and a bonding portion of the first substrate 21 and the second substrate 22 Step ⁇ for forming a cavity 24 and a through hole 25 communicating with the cavity 24 in at least a part thereof is sequentially provided.
- the present invention after the first substrate 21 and the second substrate 22 are bonded together, one of the substrates is thinned, and then the cavity 24 is formed. Accordingly, it is possible to avoid the occurrence of unevenness and cracks after grinding due to the presence or absence of the cavity 24, and it is possible to grind a more uniform and thin wafer. Thereby, the thickness of the package can be made thinner than before. As a result, in the present invention, a semiconductor device that can contribute to miniaturization of devices and electronic devices on which the devices are mounted can be manufactured in a simpler process.
- 4A to 4E are schematic cross-sectional views showing the respective steps in the manufacturing method of the present embodiment. Hereinafter, each step will be described in detail. In the following description, specific examples are described, but the present invention is not limited to these.
- a first substrate 21 having optical transparency and a second substrate 22 provided with a functional element 23 on one side are opposed to the first substrate 21.
- the second substrate 22 and the first substrate 21 are bonded together.
- a Pyrex (registered trademark) glass substrate (4 inches, thickness 500 ⁇ m) is used as the first substrate 21, and a Si substrate in which a MEMS device or an image sensor is arranged as a functional element 23 on one side as the second substrate 22. (4 inches, thickness 525 ⁇ m) was used, and both were bonded by anodic bonding.
- step ⁇ at least one of the first substrate 21 and the second substrate 22 is thinned [step ⁇ ]. After the first substrate 21 and the second substrate 22 are bonded together, the second substrate 22 is ground and thinned. In the present embodiment, the second substrate 22 was mechanically ground and then polished, so that the thickness of the second substrate 22 was 100 ⁇ m.
- a cavity 24 and a through hole 25 communicating with the cavity 24 are formed in at least a part of the bonded portion of the first substrate 21 and the second substrate 22 [ Step ⁇ ].
- the modified portions 21a and 21b are formed by irradiating the predetermined position of the first substrate 21 with the laser beam L, and the modified portions 21a and 21b are removed, whereby the through holes 25 and Each cavity 24 is formed.
- the laser beam L modifies the vicinity of the bonding interface between the first substrate 21 and the second substrate 22.
- the modified portion 21a is formed in the vertical direction from the surface of the first substrate 21, that is, the Pyrex (registered trademark) glass, and then the Pyrex (registered trademark) glass near the bonding interface is formed in the cavity to be formed.
- the modified portion 21b was formed by modifying so as to correspond to the size of 24.
- a femtosecond laser average output: 800 mW, pulse width: 250 fs, repetition frequency: 2 kHz, wavelength: 800 nm
- the Pyrex (registered trademark) glass is focused and irradiated.
- the reforming parts 21a and 21b were formed.
- the modified portions 21a and 21b are etched with a chemical solution to form a cavity 24 and a through hole 25.
- the modified portions 21a and 21b are etched faster than the unmodified portions, so that the cavity 24 and the through hole 25 can be formed as a result.
- a sealing portion 26 for hermetically sealing the cavity 24 is formed [step ⁇ ].
- the through hole 25 may be closed with a sealing portion 26 made of low melting point glass or resin.
- the cavity 24 can be hermetically sealed.
- the first substrate 21 on the cavity 24 thinned by grinding can be used as a flexible diaphragm, and a new function such as pressure sensing can be added.
- the semiconductor device 1B as shown in FIG. 3 is obtained.
- the semiconductor device 1B obtained in this way the occurrence of irregularities and cracks due to the presence or absence of cavities is avoided, and the substrate is thinned more uniformly. Thereby, it can contribute to size reduction of a device and the electronic device in which they are mounted.
- first substrate 21 and the second substrate 22 may be a combination other than the present embodiment, or may be Pyrex (registered trademark) substrates or other glass and Si wafers.
- the wavelength of the laser beam L is appropriately set so that it can pass through the substrate.
- the thickness can be appropriately set to about 150 ⁇ m to 1 mm.
- the bonding method is not limited to anodic bonding, and room temperature bonding or an adhesive may be used. Further, a plurality of longitudinal reforming sections may be provided.
- the present invention can be widely applied to a semiconductor device having a cavity and a manufacturing method thereof.
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Abstract
Description
本願は、2007年12月25日に出願された日本国特許出願第2007-331695号に対し優先権を主張し、その内容をここに援用する。
伊藤達也、「電子材料」2007年1月号、p.60-64 S.Yamamoto他、ICEP2006予稿集、p.259-264
本発明の半導体装置の製造方法では、前記貼り合わせ工程において、前記第一基板と前記第二基板とを、貼り合わせ部分に感光性樹脂を供給し、この感光性樹脂を露光して硬化させることによって貼り合わせ;前記貫通孔形成工程において、硬化後の前記感光性樹脂の所定部分を除去することによって前記キャビティを形成することが望ましい。
本発明の半導体装置の製造方法では、前記貫通孔形成工程において、前記第一基板の所定位置にレーザー光を照射して改質部を形成し、この改質部を除去することによって、前記キャビティを形成することが望ましい。
本発明の半導体装置の製造方法において、前記工程貫通孔形成の後に、前記キャビティを気密封止する封止部を形成する封止部形成工程を、さらに備えることが望ましい。
本発明に係る半導体装置は、光透過性を有する第一基板と;一面に機能素子を備え、この機能素子が前記第一基板と対向するように貼り合わされた第二基板と;前記第一基板と前記第二基板の貼り合せ部であって前記機能素子に対応する部分に配されたキャビティと;このキャビティに連通して配された貫通孔と;を備える。
本発明の半導体装置において、前記機能素子は、撮像素子であることが望ましい。
本発明の半導体装置において、前記機能素子は、圧力センサ素子であることが望ましい。
11,21 第一基板
12,22 第二基板
13,23 機能素子
14 感光性樹脂
15,24 キャビティ
16,25 貫通孔
17,26 封止部
まず、本発明の第一実施形態について説明する。
図1は、本実施形態の半導体装置の一例を示す模式的断面図である。
この半導体装置1A(1)は、光透過性を有する第一基板11と、一面に機能素子13を備え、この機能素子13が前記第一基板11と対向するように第一基板11と貼り合わせられてなる第二基板12と、前記第一基板11と前記第二基板12の貼り合せ部であって前記機能素子13に対応する部分に配されたキャビティ15と、このキャビティ15に連通して配された貫通孔16と、キャビティ15及び貫通孔16を封止する封止部17と、を備えている。
この半導体装置1Aでは、第一基板11と第二基板12とは、感光性樹脂14によって貼り合わせられている。
また、機能素子13の他の例としては、例えばICチップ、光素子、マイクロリレー、マイクロスイッチ、加速度センサ、高周波フィルタ、マイクロミラー、マイクロリアクター、μ-TAS、DNAチップ、MEMSデバイス、マイクロ燃料電池等を用いることができる。
本発明の半導体装置の製造方法は、光透過性を有する第一基板11と、一面に機能素子13を備えた第二基板12とを、この機能素子13が第一基板11と対向するように貼り合わせる工程αと、前記第一基板11及び前記第二基板12の少なくとも一方(ここでは第二基板12)を薄板化する工程βと、前記第一基板11と前記第二基板12の貼り合せ部の少なくとも一部に、キャビティ15及びこのキャビティ15に連通する貫通孔16を形成する工程γと、を順に備える。
これにより、従来よりもパッケージの厚さをより薄くすることが可能となる。その結果、本発明ではデバイス及びそれらが搭載される電子機器の小型化に貢献できる半導体装置を、より簡便な工程で製造可能である。
図2A~2Eは、本実施形態の製造方法において各工程を示す模式的断面図である。
以下、各工程について詳細に説明する。なお、以下の説明では、具体的な例を挙げて説明しているが、本発明はこれらに限定されるものではない。
第一基板11としては、イメージセンサパッケージにも適用できるように可視領域において透明なガラス基板(パイレックス(登録商標)、4インチ、厚さ500μm)を用いた。
第二基板12としては、一面に機能素子13としてMEMSデバイスやイメージセンサを配したSi基板 (4インチ、厚さ525μm)を用いた。
なお、第一基板11には、キャビティ15が形成される箇所に予め貫通孔16が1本形成されている。
樹脂の塗布方法は特に限定されるものでないが、例えばスタンピング、ディスペンス、スピンコート、スプレーコート等の手法を用いることが可能である。
ここでは感光性樹脂14として、露光された箇所が硬化するネガタイプのものを用いた。
第一基板11と第二基板12とを貼り合せた後、第二基板12の研削をおこない薄板化する。本実施例においては、第二基板12(Si基板)を機械的に研削した後、ポリッシュ加工をおこない、第二基板12の厚さが100μmとなるようにした。
ここで、本実施形態においては、硬化後の感光性樹脂14の所定部分を除去することによって前記キャビティ15を形成する。
キャビティ15の形成後、上記貫通孔16を低融点ガラスや樹脂などからなる封止部17により閉塞してもよい。これによりキャビディ15を気密封止することができる。また、研削により薄板化されたキャビティ15上の第二基板12を、可撓性のあるダイアフラムとして利用することもでき、圧力のセンシングなど新たな機能を付加することもできる。
以上のようにして図1に示したような半導体装置1Aが得られる。
次に、本発明の第二実施形態について説明する。
図3は、本実施形態の半導体装置の一例を示す模式的断面図である。
この半導体装置1B(1)は、光透過性を有する第一基板21と、一面に機能素子23を備え、この機能素子23が前記第一基板21と対向するように第一基板21と貼り合わせられてなる第二基板22と、前記第一基板21と前記第二基板22の貼り合せ部であって前記機能素子23に対応する部分に配されたキャビティ24と、このキャビティ24に連通して配された貫通孔25と、キャビティ24及び貫通孔25を封止する封止部26と、を備えている。
第一基板21、第二基板22及び機能素子23は、それぞれ上述した第一基板11、第二基板22及び機能素子13と同様のものを用いることができる。
本発明の半導体装置の製造方法は、光透過性を有する第一基板21と、一面に機能素子23を備えた第二基板22とを、この機能素子23が第一基板21と対向するように貼り合わせる工程αと、前記第一基板21及び第二基板22の少なくとも一方(ここでは第二基板22)を薄板化する工程βと、前記第一基板21と前記第二基板22の貼り合せ部の少なくとも一部に、キャビティ24及びこのキャビティ24に連通する貫通孔25を形成する工程γと、を順に備える。
その結果、本発明ではデバイス及びそれらが搭載される電子機器の小型化に貢献できる半導体装置を、より簡便な工程で製造可能である。
図4A~4Eは、本実施形態の製造方法において各工程を示す模式的断面図である。
以下、各工程について詳細に説明する。なお、以下の説明では、具体的な例を挙げて説明しているが、本発明はこれらに限定されるものではない。
まず、第二基板22と第一基板21を貼り合せる。本実施例においては、第一基板21としてパイレックス(登録商標)ガラス基板(4インチ、厚さ500μm)を用い、第二基板22として一面に機能素子23としてMEMSデバイスやイメージセンサを配したSi基板 (4インチ、厚さ525μm)を用い、陽極接合により両者を貼り合せた。
第一基板21と第二基板22の貼り合せ後、第二基板22の研削を行い薄板化する。本実施例においては、第二基板22を機械的に研削した後、ポリッシュ加工をおこない、第二基板22の厚さが100μmとなるようにした。
ここで本実施形態では、前記第一基板21の所定位置にレーザー光Lを照射して改質部21a,21bを形成し、この改質部21a,21bを除去することによって、貫通孔25及びキャビティ24をそれぞれ形成する。
キャビティ24の形成後、上記貫通孔25を低融点ガラスや樹脂などからなる封止部26により閉塞してもよい。これによりキャビディ24を気密封止することができる。また、研削により薄板化されたキャビティ24上の第一基板21を、可撓性のあるダイアフラムとして利用することもでき、圧力のセンシングなど新たな機能を付加することもできる。
以上のようにして図3に示したような半導体装置1Bが得られる。
Claims (7)
- 光透過性を有する第一基板と、一面に機能素子を備えた第二基板とを、前記機能素子が前記第一基板と対向するように貼り合わせる、貼り合わせ工程と;
前記第一基板及び前記第二基板の少なくとも一方を薄板化する、薄板化工程と;
前記第一基板と前記第二基板の貼り合せ部の少なくとも一部に、キャビティ及びこのキャビティに連通する貫通孔を形成する、貫通孔形成工程と;を備える半導体装置の製造方法。 - 前記貼り合わせ工程において、前記第一基板と前記第二基板とを、貼り合わせ部分に感光性樹脂を供給し、この感光性樹脂を露光して硬化させることによって貼り合わせ;
前記貫通孔形成工程において、硬化後の前記感光性樹脂の所定部分を除去することによって前記キャビティを形成する請求項1に記載の半導体装置の製造方法。 - 前記貫通孔形成工程において、前記第一基板の所定位置にレーザー光を照射して改質部を形成し、この改質部を除去することによって、前記キャビティを形成する請求項1に記載の半導体装置の製造方法。
- 前記貫通孔形成工程の後に、前記キャビティを気密封止する封止部を形成する、封止部形成工程を、さらに備える請求項1に記載の半導体装置の製造方法。
- 光透過性を有する第一基板と;
一面に機能素子を備え、この機能素子が前記第一基板と対向するように貼り合わされた第二基板と;
前記第一基板と前記第二基板の貼り合せ部であって前記機能素子に対応する部分に配されたキャビティと;
このキャビティに連通して配された貫通孔と;を備える半導体装置。 - 前記機能素子は、撮像素子である請求項5に記載の半導体装置。
- 前記機能素子は、圧力センサ素子である請求項5に記載の半導体装置。
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EP08864653.4A EP2219215A4 (en) | 2007-12-25 | 2008-12-12 | SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING THE SAME |
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US8384168B2 (en) | 2011-04-21 | 2013-02-26 | Freescale Semiconductor, Inc. | Sensor device with sealing structure |
US8476087B2 (en) | 2011-04-21 | 2013-07-02 | Freescale Semiconductor, Inc. | Methods for fabricating sensor device package using a sealing structure |
US9252172B2 (en) | 2011-05-31 | 2016-02-02 | Stats Chippac, Ltd. | Semiconductor device and method of forming EWLB semiconductor package with vertical interconnect structure and cavity region |
US9564413B2 (en) | 2011-09-15 | 2017-02-07 | STATS ChipPAC Pte. Ltd. | Semiconductor device and method of forming semiconductor die with active region responsive to external stimulus |
US9553162B2 (en) | 2011-09-15 | 2017-01-24 | STATS ChipPAC Pte. Ltd. | Semiconductor device and method of forming semiconductor die with active region responsive to external stimulus |
US9046546B2 (en) | 2012-04-27 | 2015-06-02 | Freescale Semiconductor Inc. | Sensor device and related fabrication methods |
JP6166057B2 (ja) * | 2013-02-19 | 2017-07-19 | 京セラ株式会社 | パッケージ用部材、およびパッケージ体 |
US9580302B2 (en) | 2013-03-15 | 2017-02-28 | Versana Micro Inc. | Cell phone having a monolithically integrated multi-sensor device on a semiconductor substrate and method therefor |
KR102328149B1 (ko) * | 2014-10-31 | 2021-11-18 | 에스케이하이닉스 주식회사 | 커브드 이미지 센서, 그 제조방법 및 이를 구비한 전자장치 |
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