WO2010029819A1 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- WO2010029819A1 WO2010029819A1 PCT/JP2009/063688 JP2009063688W WO2010029819A1 WO 2010029819 A1 WO2010029819 A1 WO 2010029819A1 JP 2009063688 W JP2009063688 W JP 2009063688W WO 2010029819 A1 WO2010029819 A1 WO 2010029819A1
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- Prior art keywords
- circuit board
- semiconductor device
- electromagnetic wave
- layer
- metal particles
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Definitions
- the present invention relates to a semiconductor device and a method for manufacturing the same, and in particular, cuts off noise generated from a semiconductor-mounted electronic component that requires a shield structure for avoiding adverse effects of surrounding radio waves and electromagnetic noise from the semiconductor, and the like.
- the present invention relates to the formation of a shield layer of a semiconductor device on which a high-frequency semiconductor element that needs to be mounted.
- the mounting structure of electronic components including semiconductors will be described using a mobile phone as an example.
- An RF (Radio Frequency) part that receives a high frequency from the base station with an antenna, reduces it to a frequency that can be processed and amplifies it to a radio wave that can be transmitted to the base station, and a CPU (Central Processing Unit) that processes the received signal,
- This is a baseband portion composed of various application processors and storage devices (memory) for processing images, sounds, and the like.
- the frequency of transmitted / received radio waves processed in the RF unit is as follows.
- the frequency in each communication standard in Japan is 800MHz band for PDC (Personal Digital Cellular), 1.5GHz band for cdmaOne (Code Division Multiple Access One), 1.7GHz band for CDMA2000, W-CDMA (Wideband Code Code). (Multiple Access) is the 2100 MHz band.
- GSM Global System for Mobile Communications
- GSM Global System for Mobile Communications
- D-AMPS Digital Advanced Mobile Phone System
- the 800 MHz band and the 900 MHz band are used.
- the power amplifier is a component that amplifies the transmission wave in order to transmit radio waves from the telephone to the base station so that these frequencies are obtained.
- This power amplifier has various communication systems / frequency compatible types in which the above-mentioned frequencies are selected and combined according to use and region.
- high-frequency components having wireless functions taking Japanese mobile phones as examples, in addition to power amplifiers, short-range wireless communication using infrared communication and Bluetooth, one-segment TV wave tuners for 400 MHz, FM / AM radio waves There are tuners and the like, and in the future, various wireless devices such as a WiFi (Wireless Fidelity) wireless LAN are expected to be installed. Therefore, it is necessary to consider the mutual influence of electromagnetic noise generated from these electronic components.
- WiFi Wireless Fidelity
- the baseband unit is equipped with a CPU that handles the main functions of the telephone, a main memory, various application processors that handle images, moving images, music, security, etc., various memories, and passive equipment.
- the clock frequency of these application processors is increasing year by year.
- Patent Document 1 a metal cap is applied to a module on which an IC or passive component is mounted on a substrate. A structure that covers the mounting substrate is common.
- this structure is not resin-sealed in the cap, and for large semiconductor PKGs that form resin molds, the cost of the metal cap is high, and changing the resin mold process to a metal cap structure is mass-produced. There was a problem that it was difficult. In order to perform electromagnetic shielding at low cost, it is desirable that the current package form and process can be used as they are.
- Examples of mounting structures that do not use a metal cap include those described in Japanese Patent No. 3718131 (Patent Document 2) and Japanese Patent Application Laid-Open No. 2005-109306 (Patent Document 3).
- This structure includes a semiconductor element mounted on one surface of a substrate, an insulating resin formed so as to seal them, and a metal thin film formed on the resin surface. The metal thin film is formed on the substrate. It is electrically connected to the wiring pattern.
- the metal thin film formed on the surface of the insulating resin can be formed as a single layer or multiple layers by plating using gold, silver, copper, nickel or the like.
- the current package form and process can be used, but in order to obtain a sufficient shielding effect, it is said that lowering the sheet resistance by multilayering is effective. Due to the multi-layering, it is necessary to go through a plurality of plating processes, resulting in a significant cost increase.
- an object of the present invention is to provide a package with an electromagnetic wave noise countermeasure shield that does not adversely affect noise from other semiconductors in mounting electronic components that require high-density mounting, and does not emit its own noise. It is an object of the present invention to provide a semiconductor device that can be manufactured at low cost while maintaining reliability in a heating process using a conventional semiconductor assembly process, and a manufacturing method thereof.
- the outline of a typical one is that the metal plating film is formed on the pretreatment layer using high-pressure CO 2 formed only on the upper surface of the sealing body with the back surface of the wiring board protected. It is electrically connected to the end portion of the ground wiring layer on the side surface of the substrate or the ground connection through hole connected to the end portion of the ground wiring layer.
- the effect obtained by a typical one is that the electromagnetic wave shielding layer formed of a metal sintered body has fine holes in the thin film layer, and the insulating resin layer and circuit board in the manufacturing process of the semiconductor device Water vapor from the inside of the metal thin film electromagnetic shielding layer is easily released from the inside to the outside, preventing peeling at the interface between the sealing body and the electromagnetic shielding layer of the metal thin film, and cracking of the electromagnetic shielding layer of the metal thin film Can be prevented.
- the metal thin film layer can be formed without significant change in the manufacturing process of the conventional semiconductor device.
- 1 is an external perspective view of a semiconductor device according to an embodiment of the present invention.
- 1 is a schematic cross-sectional view of a semiconductor device according to an embodiment of the present invention. It is a figure which shows the wiring layout of the 4-layer circuit board of the semiconductor device which concerns on one embodiment of this invention. It is a figure which shows the wiring layout of the 4-layer circuit board of the semiconductor device which concerns on one embodiment of this invention. It is an example of a scanning electron microscope observation of the electromagnetic wave shielding layer of the semiconductor device concerning one embodiment of the present invention. It is a figure which shows the relationship between the hole diameter of a shield layer, the level of the electromagnetic wave measured through the shield layer, and water vapor permeability. It is a figure which shows the manufacturing method of the semiconductor device which concerns on one embodiment of this invention. It is a figure which shows the manufacturing method of the semiconductor device which concerns on one embodiment of this invention.
- FIG. 1 is an external perspective view of a semiconductor device according to an embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view of the semiconductor device according to an embodiment of the present invention.
- Yes. 3 and 4 are diagrams showing a wiring layout of a four-layer circuit board of a semiconductor device according to an embodiment of the present invention.
- FIG. 5 is a scanning electron microscope observation example of the electromagnetic wave shielding layer of the semiconductor device according to one embodiment of the present invention.
- an electronic component package as a semiconductor device has an electromagnetic wave shielding layer 2 formed on a circuit board 1 formed of a multilayer board.
- At least two or more ground patterns 3 and wiring patterns 4 are formed on the inner and outer layers of the circuit board 1. Furthermore, a via hole 12 is formed in the circuit board 1 to provide electrical connection between layers. In the example shown in FIG. 2, an example of a four-layer substrate is shown.
- mounting components 5 and 6 semiconductor integrated circuit elements such as IC, chip resistors, chip capacitors, etc. are soldered on the wiring pattern 4 on the upper surface of the circuit board 1 having the ground pattern 3 (not shown). 1) or wire 11 or the like.
- the electronic component package is used by mounting the wiring pattern 4 on the lower surface of the circuit board 1 on the side opposite to the mounting components 5 and 6 and a mother board (not shown) by soldering, and conducting with the mother board.
- a sealing body 7 is formed of an insulating resin made of an epoxy resin containing an inorganic filler, and the electromagnetic shielding layer 2 is further formed on the surface of the sealing body 7.
- FIG. 3A shows the layout of the first layer of the circuit board on which the component is mounted, and configures a wiring pattern that matches the electrode terminal arrangement of the mounted component.
- FIG. 3B is a layout of the second layer of the circuit board. A portion 3 corresponding to the ground pattern of the power source supplied to the semiconductor component is greatly widened, and a portion 30 of the portion is exposed at the end of the package when the package is separated.
- FIG. 4A shows the layout of the third layer of the circuit board. In the third layer, connection inside the circuit board is performed.
- FIG. 4B shows a layout of the fourth layer of the circuit board. In the fourth layer, connection electrodes for connecting the circuit board and the mother board are formed.
- a part of the ground pattern 3 is exposed on the outer surface on the end surface of the circuit board 1, and the electromagnetic wave shielding layer 2 formed on the surface of the sealing body 7 is exposed on the outer surface. It is electrically connected to the ground pattern 3.
- the electromagnetic wave shielding layer 2 is formed by applying metal particles to the surface of the sealing body 7 and the end face of the circuit board 1 and sintering, and has a structure having pores between the sintered particles. Furthermore, an electrical connection with the ground pattern 3 is formed simultaneously with the sintering.
- the electromagnetic wave shielding layer 2 thus formed has a structure in which the electromagnetic wave shielding layer 2 is also formed around the sealing body 7 and on the end face of the circuit board 1, and shields the mounting components 5 and 6 from external electromagnetic noise. can do.
- the metal used for the sintered metal layer forming the electromagnetic wave shielding layer 2 includes gold (Au), silver (Ag), copper (Cu), nickel (Ni), etc., but from the viewpoint of conductivity, cost, etc., silver Or the electromagnetic wave shielding layer 2 which is excellent in electroconductivity and has sufficient electromagnetic wave shielding effect can be formed by using a mixture of silver and copper.
- the sintered metal layer formed using silver as the metal particles has a large number of fine holes 8, and the moisture absorbed by the insulating resin as the sealing body 7 and the circuit board 1 is vaporized by heating to form water vapor. And is discharged to the outside of the electronic component package through the hole 8.
- the vaporized water vapor does not stay at the interface between the sealing body 7 and the electromagnetic wave shielding layer 2, and the pressure rise due to the thermal expansion of the water vapor does not occur, so that the electromagnetic wave shielding layer 2 does not crack.
- FIG. 6 shows the relationship between the hole diameter of the shield layer, the electromagnetic wave level measured through the shield layer, and the water vapor transmission rate.
- the size of the hole 8 in the sintered metal layer varies depending on the frequency of the electromagnetic wave to be shielded, a hole having a diameter of about 300 ⁇ m can be shielded at a frequency of about 900 MHz to 2 GHz used in a mobile phone or the like.
- the diameter of the shield layer it is desirable to set the diameter to 50 ⁇ m or less in order to ensure a stable electromagnetic wave shielding effect.
- the water vapor permeability tends to increase as the pore diameter increases.
- the minimum pore diameter is 0.1 ⁇ m or more, considering that vaporized water vapor can easily pass through and that the sintering agent is easily vaporized during the sintering process of the metal particles.
- Metal particles used for sintering are sintered in an air atmosphere by a joining material including metal oxide particles having an average particle diameter of 1 nm to 50 ⁇ m and a reducing agent made of an acetic acid compound or a formic acid compound and an organic substance. By performing the above, a sintered metal layer can be obtained.
- the metal particles are reduced at a low temperature. At that time, metal particles having an average particle size of 100 nm or less are produced, and the metal particles are fused with each other to be sintered. This phenomenon is used.
- metal oxide particles In the presence of a reducing agent, metal oxide particles begin to be produced at 200 ° C. or less and 100 nm or less, so that sintering can be achieved even at a low temperature of 200 ° C. or less, which has been difficult in the past.
- metal particles having a particle size of 100 nm or less are produced in-situ during sintering, the metal particles enter the fine portions of the surface of the sealing body 7 without performing the surface treatment of the sealing body 7 or the like. The bonding strength between the sealing body 7 and the electromagnetic wave shielding layer 2 can be ensured.
- the average particle size of the metal particles used here is 1 nm or more and 50 ⁇ m or less.
- the average particle size of the metal particles is larger than 50 ⁇ m, it is difficult to produce metal particles having a particle size of 100 nm or less during bonding. This is because the gaps between the particles increase and it becomes difficult to obtain a sintered layer.
- the reason why the thickness is 1 nm or more is that it is difficult to actually produce metal particles having an average particle size of 1 nm or less.
- the metal particles since metal particles having a particle size of 100 nm or less are produced in the sintering process, the metal particles need not have a particle size of 100 nm or less, and the metal particle precursor is produced, handled, and stored for a long time. From the viewpoint of properties, it is preferable to use particles having a particle size of 1 to 50 ⁇ m.
- metal oxide particles examples include silver oxide (Ag 2 O, AgO) and copper oxide (CuO). It is possible to use a material made of at least one kind of metal or two kinds of metals from these groups. .
- Examples of the acetic acid compound particles include silver acetate and copper acetate, and examples of the formic acid compound particles include silver formate and copper formate, and a joint composed of at least one metal or two or more metals from these groups. It is possible to use materials.
- the content of the metal particles is preferably more than 50 parts by mass and 99 parts by mass or less in all parts by mass in the sintered material. This is because when the metal content in the bonding material is large, organic residue is reduced after bonding at a low temperature, and it is possible to achieve a fired layer and achieve metal bonding at the sintered interface, thereby improving the strength of the electromagnetic wave shielding layer 2. This is because it becomes possible.
- reducing agent composed of an organic substance a mixture of one or more selected from alcohols, carboxylic acids, and amines can be used.
- Examples of the compound containing an available alcohol group include alkyl alcohols such as ethanol, propanol, butyl alcohol, pentyl alcohol, hexyl alcohol, heptyl alcohol, octyl alcohol, nonyl alcohol, decyl alcohol, undecyl alcohol, There are dodecyl alcohol, tridecyl alcohol, tetradecyl alcohol, pentadecyl alcohol, hexadecyl alcohol, heptadecyl alcohol, octadecyl alcohol, nonadecyl alcohol and icosyl alcohol.
- alkyl alcohols such as ethanol, propanol, butyl alcohol, pentyl alcohol, hexyl alcohol, heptyl alcohol, octyl alcohol, nonyl alcohol, decyl alcohol, undecyl alcohol.
- dodecyl alcohol tridecyl alcohol, tetradecyl alcohol, pentadecyl alcohol
- the primary alcohol type it is possible to use not only the primary alcohol type but also an alcohol compound having a secondary alcohol type, a tertiary alcohol type such as ethylene glycol or triethylene glycol, and an alkanediol or cyclic structure.
- compounds having four alcohol groups such as citric acid and ascorbic acid may be used.
- alkyl carboxylic acid as a compound containing available carboxylic acid.
- Specific examples include butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, Nonadecanoic acid and icosanoic acid are mentioned.
- alkylamine can be mentioned as a compound containing an available amino group.
- alkylamine can be mentioned as a compound containing an available amino group.
- the compound having an amino group may have a branched structure, and examples thereof include 2-ethylhexylamine and 1,5-dimethylhexylamine. Moreover, not only a primary amine type but also a secondary amine type and a tertiary amine type can be used. Further, such an organic material may have an annular shape.
- the reducing agent to be used is not limited to the organic substance containing the alcohol, carboxylic acid, and amine, but may be an organic substance containing an aldehyde group, an ester group, a sulfanyl group, a ketone group, or the like.
- reducing agents that are liquid at 20 to 30 ° C. such as ethylene glycol and triethylene glycol are reduced to silver after one day if mixed with silver oxide (Ag 2 O) and left to stand. Need to be used immediately.
- myristyl alcohol, laurylamine, ascorbic acid, etc. which are solids in the temperature range of 20 ° C to 30 ° C, do not react significantly with metal oxides for about a month, so they have excellent storage stability. These are preferably used when stored for a long time after mixing.
- the reducing agent to be used has a certain carbon number in order to function as a protective film for the purified metal particles having a particle size of 100 nm or less after reducing the metal oxide or the like.
- the carbon number is desirably 2 or more and 20 or less. This is because, when the number of carbon atoms is less than 2, metal particles are produced at the same time as particle size growth occurs, making it difficult to produce metal particles of 100 nm or less.
- the decomposition temperature becomes high and the metal particles are hardly sintered.
- the amount of the reducing agent used may be in the range of 1 to 50 parts by mass with respect to the total weight of the metal particles. This is because when the amount of the reducing agent is less than 1 part by mass, the amount of the metal particles in the bonding material is not reduced enough to produce fine metal particles.
- the amount exceeds 50 parts by mass, the residue after bonding increases, and it is difficult to achieve metal bonding at the interface and sintering in the bonding silver layer.
- the combination of metal particles and organic reducing agent is not particularly limited as long as fine metal particles can be produced by mixing them, but from the viewpoint of storage stability, a combination that does not produce metal particles at room temperature. It is preferable that
- the electromagnetic wave shielding layer 2 of the metal thin film formed by sintering the metal particles shields the high frequency transmitted from the high frequency semiconductor element, similarly to the shielding layer by the metal cap, It is possible to shield high frequencies of other semiconductor devices.
- the electromagnetic wave shielding layer 2 of this metal thin film is formed of a sintered metal, it has fine holes in the thin film layer, and from the insulating resin layer and circuit board in the semiconductor device manufacturing process. Water vapor is easily released from the inner side to the outer side of the electromagnetic wave shielding layer 2 of the metal thin film, and the sealing resin 7 for sealing provided around the mounting components 5 and 6 and the electromagnetic wave of the metal thin film Separation at the interface of the shield layer 2 can be prevented, and cracks in the electromagnetic wave shield layer 2 of the metal thin film can be prevented.
- FIGS. 7 and 8 are views showing a method of manufacturing a semiconductor device according to an embodiment of the present invention.
- FIG. 7 is a diagram in which an adhesive film for cutting / holding is fixed to the lower surface of the circuit board 1, and FIG. The lower surface of the circuit board 1 cuts the circuit board 1 to the ground layer and fixes it with the circuit board 1.
- mounting components 5 and 6 such as elements are mounted on the circuit board 1, and the mounting components 5 and 6 on the circuit board are soldered as shown in FIG. 7 (b). 10 and wire 11 are used for electrical connection.
- the upper surface of the circuit board 1 is sealed with a sealing body 7 such as a sealing resin, and as shown in FIG.
- the adhesive tape 20 for holding is fixed.
- the sealing portion of the sealing body 7 and the circuit board 1 are cut and divided in units of electronic component packages that are semiconductor devices.
- the electromagnetic wave shielding layer 2 is formed by applying metal particles (liquid) by, for example, ink-jetting, and curing them by sintering.
- the adhesive tape 20 is peeled off to separate the respective electronic component packages.
- the electromagnetic wave shielding layer 2 is formed by applying metal particles (liquid) by, for example, ink-jetting and curing by applying sintering.
- circuit board 1 is re-cut and the respective electronic component packages are separated.
- the electromagnetic wave shielding layer 2 is sintered with a mixture of metal particles, metal oxide particles, an acetic acid compound or formic acid compound, and a reducing agent made of an organic substance.
- a mixture of metal particles, metal oxide particles, an acetic acid compound or formic acid compound, and a reducing agent made of an organic substance By forming the metal thin film layer, it is possible to form the metal thin film layer without significant change in the manufacturing process of the conventional semiconductor device.
- a semiconductor device can be manufactured without using an adhesive film that protects the lower surface of the circuit board 1 as shown in FIG.
- the present invention relates to a semiconductor device, and relates to a semiconductor-mounted electronic component that requires a shield structure for avoiding the adverse effects of surrounding radio waves and electromagnetic noise from the semiconductor, and a high frequency that needs to block noise generated from itself.
- the present invention can be widely applied to semiconductor devices on which semiconductor elements are mounted.
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Abstract
Description
Claims (5)
- 2つ以上の配線層を有する回路基板と、
前記回路基板上に実装され、前記回路基板の上面の前記配線層のパッドと接続される電子部品と、
前記回路基板上の前記電子部品を絶縁樹脂で封止した封止体と、
前記封止体の表面に金属粒子を塗布し、塗布した金属粒子を焼結させることにより形成された電磁波シールド層とを備え、
前記電磁波シールド層は、前記回路基板の前記配線層の1つと電気的に接続されることを特徴とする半導体装置。 - 請求項1記載の半導体装置において、
前記電磁波シールド層は、銀、または銀と銅からなる金属粒子を焼結させることにより形成されたものであることを特徴とする半導体装置。 - 請求項1記載の半導体装置において、
前記電磁波シールド層は、前記焼結により形成された0.1μm以上50μm以下の複数の孔を有することを特徴とする半導体装置。 - 請求項1記載の半導体装置において、
前記電磁波シールド層は、金属酸化物粒子と、酢酸系化合物または蟻酸系化合物と、有機物からなる還元剤との混合物を焼結させることにより形成されたものであることを特徴とする半導体装置。 - 2つ以上の配線層を有する回路基板上に、電子部品を実装する工程と、
前記電子部品を前記回路基板の上面の前記配線層のパッドと接続する工程と、
前記回路基板上の前記電子部品を絶縁樹脂の封止体で封止する工程と、
前記封止体の表面に金属粒子を塗布し、塗布した前記金属粒子を焼結させ、前記回路基板の前記配線層の1つと電気的に接続させる工程とを有することを特徴とする半導体装置の製造方法。
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US13/062,565 US20110156225A1 (en) | 2008-09-10 | 2009-07-31 | Semiconductor device and method of manufacturing the same |
JP2010528690A JPWO2010029819A1 (ja) | 2008-09-10 | 2009-07-31 | 半導体装置およびその製造方法 |
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- 2009-07-31 CN CN2009801320042A patent/CN102150260A/zh active Pending
- 2009-07-31 WO PCT/JP2009/063688 patent/WO2010029819A1/ja active Application Filing
- 2009-07-31 US US13/062,565 patent/US20110156225A1/en not_active Abandoned
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JP2011228322A (ja) * | 2010-04-15 | 2011-11-10 | Alps Electric Co Ltd | 電子回路モジュールの製造方法及び電子回路モジュール |
JP2013166811A (ja) * | 2012-02-14 | 2013-08-29 | Seiko Epson Corp | インクセット、半導体実装基板および電子機器 |
JP2022109908A (ja) * | 2013-11-05 | 2022-07-28 | スカイワークス ソリューションズ,インコーポレイテッド | パッケージ化電子デバイス、パッケージ化無線周波数(rf)モジュールを作製するための方法、およびワイヤレスデバイス |
JP2019176172A (ja) * | 2013-11-05 | 2019-10-10 | スカイワークス ソリューションズ, インコーポレイテッドSkyworks Solutions, Inc. | パッケージ化電子デバイス、パッケージ化無線周波数(rf)モジュールを作製するための方法、およびワイヤレスデバイス |
JP7242938B2 (ja) | 2013-11-05 | 2023-03-20 | スカイワークス ソリューションズ,インコーポレイテッド | パッケージ化電子デバイス、および無線周波数モジュール |
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US11398389B2 (en) | 2017-07-20 | 2022-07-26 | Mitsui Chemicals Tohcello, Inc. | Method of producing electronic device |
WO2019017226A1 (ja) | 2017-07-20 | 2019-01-24 | 三井化学東セロ株式会社 | 電子装置の製造方法 |
US11462482B2 (en) | 2017-07-20 | 2022-10-04 | Mitsui Chemicals Tehcello, Inc. | Method of producing electronic device |
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KR102407502B1 (ko) * | 2017-07-20 | 2022-06-13 | 미쓰이 가가쿠 토세로 가부시키가이샤 | 전자 장치의 제조 방법 |
US10923433B2 (en) | 2018-05-04 | 2021-02-16 | Samsung Electronics Co., Ltd. | Fan-out semiconductor package |
JP2019195034A (ja) * | 2018-05-04 | 2019-11-07 | サムスン エレクトロニクス カンパニー リミテッド | ファン−アウト半導体パッケージ |
KR102070563B1 (ko) * | 2018-06-01 | 2020-01-29 | 삼성전자주식회사 | 전자파 차폐 구조물 및 이를 포함하는 반도체 패키지 |
KR20190137348A (ko) * | 2018-06-01 | 2019-12-11 | 삼성전자주식회사 | 전자파 차폐 구조물 및 이를 포함하는 반도체 패키지 |
CN113594151A (zh) * | 2021-06-25 | 2021-11-02 | 苏州汉天下电子有限公司 | 半导体封装及其制造方法 |
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WO2023286748A1 (ja) * | 2021-07-16 | 2023-01-19 | 富士フイルム株式会社 | 電子デバイス及び電子デバイスの製造方法 |
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Also Published As
Publication number | Publication date |
---|---|
CN102150260A (zh) | 2011-08-10 |
US20110156225A1 (en) | 2011-06-30 |
TW201013881A (en) | 2010-04-01 |
JPWO2010029819A1 (ja) | 2012-02-02 |
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