WO2018211643A1 - 増幅器 - Google Patents
増幅器 Download PDFInfo
- Publication number
- WO2018211643A1 WO2018211643A1 PCT/JP2017/018581 JP2017018581W WO2018211643A1 WO 2018211643 A1 WO2018211643 A1 WO 2018211643A1 JP 2017018581 W JP2017018581 W JP 2017018581W WO 2018211643 A1 WO2018211643 A1 WO 2018211643A1
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- Prior art keywords
- wires
- terminal
- chip
- metal pattern
- transistor
- Prior art date
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- 239000002184 metal Substances 0.000 claims abstract description 73
- 239000000758 substrate Substances 0.000 claims abstract description 43
- 230000003071 parasitic effect Effects 0.000 description 15
- 230000002500 effect on skin Effects 0.000 description 10
- 230000003993 interaction Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Definitions
- This invention relates to an amplifier.
- Patent Document 1 an FET is fixed to a dielectric substrate on a metal carrier, a microstrip line is formed on the dielectric substrate, and the microstrip line is wider than the gate electrode, drain electrode, and microstrip line of the FET. It is disclosed that the input / output upper electrodes are connected by a plurality of metal wires. Patent Document 1 further discloses that the length of the metal wire is increased from the edge in the width direction of the FET toward the center.
- Patent Document 2 discloses a microwave amplifier in which an input / output terminal and an input / output electrode of a semiconductor amplifying element are connected by a plurality of wirings.
- the impedance value of each wiring in a wiring row composed of a plurality of wirings is minimized in the wiring in the central row, and the impedance value of each wiring is increased toward the end of the wiring row.
- the transmission power in each wiring is made uniform, and the gain, power added efficiency, and distortion characteristics of the microwave amplifier are improved.
- the amplifier is manufactured by die-bonding the transistor chip and the matching substrate in the package and realizing the necessary electrical connection with bonding wires.
- a transistor chip and a matching substrate are connected by a wire, and an input / output terminal of the package and a matching substrate are connected by a wire.
- a transistor chip having a structure in which a plurality of parallel transistor cells are coupled may be used. It is desirable that the plurality of transistor cells operate uniformly. However, due to the interaction of magnetic fields from a plurality of wires provided in parallel and the skin effect in a conductor such as a terminal, a phase difference occurs in the input / output signals in each transistor cell. For this reason, the operations of the plurality of transistor cells are not uniform. As a result, the power gain, saturation output power, and power added efficiency of the amplifier are reduced as compared with a case where uniform operation of a plurality of transistor cells is assumed.
- the present invention has been made to solve the above-described problems, and an object thereof is to provide an amplifier capable of uniformly operating a plurality of transistor cells formed on a transistor chip.
- the amplifier according to the present invention includes a transistor chip having a plurality of transistor cells, a gate pad, and a drain pad, a matching substrate having a metal pattern formed on a surface thereof, a width of the transistor chip, and a width of the matching substrate.
- a terminal having a large width; a plurality of terminal wires for connecting the terminal and the metal pattern; and a plurality of chip wires for connecting the metal pattern and the transistor chip; and connected to the terminals of the plurality of terminal wires
- the distance between the wires connected to the metal pattern of the plurality of terminal wires is larger than the distance between the wires in the formed portion.
- Another amplifier according to the present invention includes a transistor chip having a plurality of transistor cells, a gate pad, and a drain pad, and a metal pattern formed on a surface thereof.
- the width of the metal pattern is equal to the width of the gate pad or the drain.
- the distance between the wires connected to the transistor chip of the plurality of chip wires is larger than the distance between the wires connected to the metal pattern.
- the plurality of transistor cells formed in the transistor chip can be uniformly operated by making the plurality of wires non-parallel and connecting the wires to a place where the influence of the skin effect is small.
- FIG. 1 is a cross-sectional view of an amplifier according to a first embodiment. It is a top view inside a package. It is a top view which shows the internal structure of the amplifier which concerns on a comparative example. It is sectional drawing of the some terminal wire which concerns on a comparative example. It is a figure which shows the current imbalance by a skin effect.
- 6 is a plan view of the inside of an amplifier according to Embodiment 2.
- FIG. 1 is a cross-sectional view of an amplifier 10 according to Embodiment 1 of the present invention.
- the amplifier 10 includes a package 12.
- the package 12 includes a metal base portion 12a, a side wall portion 12b provided on the metal base portion 12a, and a lid portion 12c provided on the side wall portion 12b.
- a terminal 13 and a terminal 14 are fixed to the package 12.
- Matching substrates 20 and 24 and a transistor chip 22 are provided in the package 12.
- the matching substrate 20, the transistor chip 22, and the matching substrate 24 are formed on different substrates.
- the transistor chip 22 is a field effect transistor formed of, for example, GaN.
- the terminal 13 and the matching substrate 20 are connected by a terminal wire W1.
- the matching substrate 20 and the transistor chip 22 are connected by a chip wire W2.
- the transistor chip 22 and the matching substrate 24 are connected by a chip wire W3.
- the matching substrate 24 and the terminal 14 are connected by a terminal wire W4.
- an input / output connection structure of the amplifier 10 using the transistor chip 22 is formed. Note that another structure may be employed as the package 12.
- FIG. 2 is a plan view of the inside of the package 12.
- the x direction in FIG. 2 is the width direction, and the y direction is the length direction.
- the y direction is a high-frequency signal transmission direction
- the x direction is a direction perpendicular to the transmission direction.
- the transistor chip 22 has a plurality of transistor cells and can cope with high output.
- the transistor chip 22 has a plurality of gate pads 22a arranged in the width direction and striped drain pads 22b extending in the width direction. When viewed as the transistor chip 22 as a whole, the length in the width direction is larger than the length in the length direction.
- the matching substrate 20 includes a dielectric 20a and a metal pattern 20b provided on the dielectric 20a. That is, the metal pattern 20 b is formed on the surface of the matching substrate 20.
- the matching substrate 20 functions as an input matching substrate.
- the matching substrate 24 includes a dielectric 24a and a metal pattern 24b provided on the dielectric 24a. That is, the metal pattern 24 b is formed on the surface of the matching substrate 24.
- the matching substrate 24 functions as an output matching substrate.
- the width of the terminals 13 and 14 is Xa.
- the width Xa is larger than the width of the transistor chip 22, the width of the matching substrates 20 and 24, and the width of the metal patterns 20b and 24b.
- the terminal 13 functions as an input terminal.
- the terminal 14 functions as an output terminal.
- a plurality of terminal wires W1 are provided.
- the plurality of terminal wires W1 connect the terminal 13 and the metal pattern 20b.
- the connection point between the plurality of terminal wires W1 and the terminal 13 is a place where Xa / 4 advances from one end 13a in the width direction of the terminal 13 to the other end 13b in the width direction of the terminal 13 when the width of the terminal 13 is Xa.
- Xa / 4 is a value obtained by dividing Xa by 4.
- the connection points of the plurality of terminal wires W1 and the terminal 13 do not exist over the entire width direction of the terminal 13 but are concentrated in the central portion of the terminal 13.
- connection point between the terminal wire W1 and the metal pattern 20b exists over the entire width direction of the metal pattern 20b.
- the distance between the wires connected to the metal pattern 20b of the plurality of terminal wires W1 is larger than the distance between the wires connected to the terminals 13 of the plurality of terminal wires W1. That is, the distance between the terminals increases as the plurality of terminal wires W1 proceeds in the positive y direction. Further, the wire length of the plurality of terminal wires W1 is longer as the wire is closer to the end.
- the plurality of terminal wires W1 are provided non-parallel.
- a plurality of terminal wires W4 are provided.
- the plurality of terminal wires W4 connect the terminal 14 and the metal pattern 24b.
- the connection point between the plurality of terminal wires W4 and the terminal 14 is a place where Xa / 4 advances from one end 14a in the width direction of the terminal 14 to the other end 14b in the width direction of the terminal 14 when the width of the terminal 14 is Xa.
- connection point between the terminal wire W4 and the metal pattern 24b exists over the entire width direction of the metal pattern 24b.
- the distance between the wires connected to the metal pattern 24b of the plurality of terminal wires W4 is larger than the distance between the wires connected to the terminals 14 of the plurality of terminal wires W4.
- the distance between the terminals of the plurality of terminal wires W4 increases as it advances in the negative y direction.
- the plurality of terminal wires W4 has a longer wire length as the wire is closer to the end.
- the plurality of terminal wires W4 are provided non-parallel.
- a plurality of chip wires W2 are provided.
- the chip wire W2 connects the metal pattern 20b and the transistor chip 22. Specifically, the plurality of chip wires W2 connect the metal pattern 20b and the gate pad 22a. One chip wire W2 is connected to one gate pad 22a. The plurality of chip wires W2 are provided in parallel.
- a plurality of chip wires W3 are provided.
- the chip wire W3 connects the metal pattern 24b and the transistor chip 22. Specifically, the plurality of chip wires W3 connect the metal pattern 24b and the drain pad 22b. All chip wires W3 are connected to one drain pad 22b. The plurality of chip wires W3 are provided in parallel.
- the plurality of terminal wires W1 are referred to as first wires
- the plurality of terminal wires W4 are referred to as fourth wires
- the plurality of chip wires W2 are referred to as second wires
- the plurality of chip wires W3 are referred to as third wires. Then, it can be said that the high-frequency signal is transmitted from the first wire, the second wire, the third wire, and the fourth wire in this order and output from the terminal 14.
- FIG. 3 is a plan view showing the internal configuration of the amplifier package according to the comparative example.
- the plurality of terminal wires W1 are provided in parallel
- the plurality of chip wires W2 are provided in parallel
- the plurality of chip wires W3 are provided in parallel
- the plurality of terminal wires W4 are provided in parallel.
- FIG. 4 is a cross-sectional view of a plurality of terminal wires W1 according to a comparative example.
- a magnetic field is generated around the plurality of terminal wires W1.
- the magnetic fields between the terminal wires W1 cancel each other. Therefore, the magnetic field of the plurality of terminal wires W1 as a whole is shown by the alternate long and short dash line in FIG.
- a broken line represents a line of electric force.
- the density of the electric field lines represents the strength of the electric field.
- the electric field is generated perpendicular to the magnetic field between the terminal wire W1 and the package 12.
- the number of adjacent terminal wires W1 is smaller than that of the central terminal wire W1, so that the interaction of magnetic fields is also reduced.
- FIG. 5 is a diagram showing that the current flowing through the terminal is unbalanced due to the skin effect.
- a plurality of terminal wires W1 are parallel.
- the plurality of terminal wires W1 are fixed to the center and the end of the terminal 13.
- a large arrow indicates that a large current flows at the end of the terminal 13.
- a small arrow indicates that a small current flows in the center of the terminal 13. Since a large amount of current flows through the terminal wires W1 at both ends, an effective parasitic inductance is reduced apart from the effect of the magnetic field interaction described above.
- the transistor cells at both ends particularly operate with a phase difference as compared with the central transistor cell. As a result, the operation of the plurality of transistor cells becomes uneven, and the power gain, saturation output power, and power added efficiency of the transistor chip 22 are reduced. Note that the same phenomenon occurs when a plurality of chip wires W2, a plurality of chip wires W3, or a plurality of terminal wires W4 are provided in parallel.
- the amplifier 10 according to Embodiment 1 of the present invention can solve this problem.
- the distance between the wires connected to the metal pattern 20b of the plurality of terminal wires W1 is larger than the distance between the wires connected to the terminals 13 of the plurality of terminal wires W1. It has become. That is, since the distance between wires increases in the direction in which signal transmission proceeds, the terminal wire W1 at the end becomes longer in wire length. In other words, the terminal wire W1 at the center is the shortest and the terminal wire W1 having a larger distance from the center terminal wire W1 is longer. By so doing, it is possible to compensate for the reduction in the parasitic inductance of the end portion and the terminal wire W1 close to the end portion.
- the end wire and the terminal wire W4 close to the end portion are made larger by making the inter-wire distance of the portion connected to the metal pattern 24b larger than the inter-wire distance of the portion connected to the terminal 14. The reduction of parasitic inductance can be suppressed.
- the plurality of terminal wires W1 are non-parallel, the current directions of the plurality of terminal wires W1 are also non-parallel. Therefore, the magnetic field interaction between the plurality of terminal wires W1 is weaker than when the plurality of terminal wires W1 are parallel. As a result, the deviation of the effective parasitic inductor of each terminal wire W1 can be reduced. Since the plurality of terminal wires W4 are also provided non-parallel, the deviation of the effective parasitic inductor of each terminal wire W4 can be reduced. Thus, in the amplifier 10 according to the first embodiment, adverse effects due to magnetic field interactions are suppressed.
- the connection point between the plurality of terminal wires W1 and the terminal 13 is that when the width of the terminal 13 is Xa, the one end 13a in the width direction of the terminal 13 is the other end in the width direction of the terminal 13. It is only between the place advanced Xa / 4 to 13b and the place advanced Xa / 4 from the other end 13b to one end 13a.
- connection point between the plurality of terminal wires W4 and the terminal 14 advances Xa / 4 from one end 14a in the width direction of the terminal 14 to the other end 14b in the width direction of the terminal 14 when the width of the terminal 14 is Xa. It is only between the place and the place which advanced Xa / 4 from the other end 14b to the one end 14a. That is, the connection points of the plurality of terminal wires W1 and the terminal 13 are concentrated at the central portion of the terminal 13, and the connection points of the plurality of terminal wires W4 and the terminal 14 are concentrated at the central portion of the terminal 14.
- the amplifier 10 according to the first embodiment, the phase difference of the signal of each transistor cell due to the interaction of the magnetic fields of the plurality of terminal wires W1 and W4 and the skin effect at the terminals 13 and 14 can be reduced. Therefore, a plurality of transistor cells formed in the transistor chip 22 can be operated uniformly, and the gain, output, and efficiency of the amplifier 10 can be increased.
- the amplifier 10 according to the first embodiment of the present invention can be variously modified without losing its characteristics. For example, even if a plurality of terminal wires W1 are provided in parallel, the plurality of terminal wires W4 have the above characteristics, so that the plurality of transistor cells can be brought closer to a uniform operation to some extent. Further, even if the plurality of terminal wires W4 are provided in parallel, the plurality of terminal wires W1 have the above characteristics, so that the plurality of transistor cells can be brought closer to a uniform operation to some extent.
- the above numerical limitation when the plurality of terminal wires W1 and W4 are concentrated on the central portions of the terminals 13 and 14 is an example. The distance between the connection points of the terminal wires W1 and W4 and the terminals 13 and 14 from the ends of the terminals 13 and 14 may be set as necessary.
- FIG. FIG. 6 is a plan view of the inside of the amplifier 30 according to the second embodiment.
- Metal patterns 20b and 24b are formed on the surfaces of the matching substrates 20 and 24, respectively.
- the widths of the metal patterns 20b and 24b are larger than the width of the gate pad 22a and the width of the drain pad 22b.
- the width of the gate pad 22a means the entire width of the plurality of gate pads 22a.
- the width of the gate pad 22a and the width of the drain pad 22b are substantially equal.
- the width of the metal pattern 20b is larger than the width of the gate pad 22a, a plurality of chip wires W2 can be made parallel.
- the distance between the wires connected to the transistor chip 22 of the plurality of chip wires W2 is larger than the distance between the wires connected to the metal pattern 20b of the plurality of chip wires W2. ing.
- connection point between the plurality of chip wires W2 and the metal pattern 20b is from the one end 20c in the width direction of the metal pattern 20b to the other end 20d in the width direction of the metal pattern 20b when the width of the metal pattern 20b is Xb. It is preferable to be between the place where Xb / 4 has advanced and the place where Xb / 4 has advanced from the other end 20d to one end 20c.
- the width of the metal pattern 24b is larger than the width of the drain pad 22b, a plurality of chip wires W3 can be made parallel.
- the distance between the wires connected to the transistor chip 22 of the plurality of chip wires W3 is larger than the distance between the wires connected to the metal pattern 24b of the plurality of chip wires W3. ing.
- connection point between the plurality of chip wires W3 and the metal pattern 24b is from the one end 24c in the width direction of the metal pattern 24b to the other end 24d in the width direction of the metal pattern 24b when the width of the metal pattern 24b is Xb. It is preferable that the distance is between the place where Xb / 4 has advanced and the place where Xb / 4 has advanced from the other end 24d to one end 24c.
- the plurality of transistor cells formed in the transistor chip 22 can be uniformly operated. Even if the plurality of chip wires W3 are provided in parallel, the plurality of chip wires W2 have the above characteristics, so that the plurality of transistor cells can be brought to a uniform operation to some extent. Even if the plurality of chip wires W2 are provided in parallel, the plurality of chip wires W3 have the above-described characteristics, so that the plurality of transistor cells can be brought to a uniform operation to some extent. Note that the terminal wires W1 and W4 shown in FIG. 2 may be replaced with the terminal wires W1 and W4 shown in FIG. 6 to further increase the uniformity of the operation of the plurality of transistor cells.
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Abstract
Description
図1は、本発明の実施の形態1に係る増幅器10の断面図である。増幅器10は、パッケージ12を備えている。パッケージ12は、金属ベース部分12a、金属ベース部分12aの上に設けられた側壁部分12b、および側壁部分12bの上に設けられたふた部分12cを備えている。パッケージ12に端子13と端子14が固定されている。
図6は、実施の形態2に係る増幅器30の内部の平面図である。整合基板20、24の表面にはメタルパターン20b、24bが形成されている。メタルパターン20b、24bの幅はゲートパッド22aの幅およびドレインパッド22bの幅より大きい。ゲートパッド22aの幅というのは複数のゲートパッド22a全体の幅という意味である。ゲートパッド22aの幅とドレインパッド22bの幅はほぼ等しい。
Claims (10)
- 複数のトランジスタセルと、ゲートパッドと、ドレインパッドを有するトランジスタチップと、
表面にメタルパターンが形成された整合基板と、
前記トランジスタチップの幅及び前記整合基板の幅より幅が大きい端子と、
前記端子と前記メタルパターンを接続する複数の端子ワイヤと、
前記メタルパターンと前記トランジスタチップを接続する複数のチップワイヤと、を備え、
複数の前記端子ワイヤの前記端子に接続された部分のワイヤ間距離よりも、複数の前記端子ワイヤの前記メタルパターンに接続された部分のワイヤ間距離が大きいことを特徴とする増幅器。 - 前記整合基板は、入力整合基板と、出力整合基板とを有し、
前記端子は、入力端子と、出力端子とを有し、
複数の前記端子ワイヤは、前記入力端子と前記入力整合基板を接続する複数の第1ワイヤと、前記出力整合基板と前記出力端子を接続する複数の第4ワイヤとを有し、
複数の前記チップワイヤは、前記入力整合基板と前記トランジスタチップを接続する複数の第2ワイヤと、前記トランジスタチップと前記出力整合基板を接続する複数の第3ワイヤと、を有することを特徴とする請求項1に記載の増幅器。 - 複数の前記端子ワイヤは端に近いワイヤほどワイヤ長が長いことを特徴とする請求項1に記載の増幅器。
- 複数の前記端子ワイヤは非平行に設けられたことを特徴とする請求項3に記載の増幅器。
- 複数の前記端子ワイヤと前記端子との接続点は、前記端子の幅をXaとしたとき、前記端子の幅方向の一端から前記端子の幅方向の他端へXa/4進んだ場所と、前記他端から前記一端へXa/4進んだ場所との間だけにあることを特徴とする請求項1~4のいずれか1項に記載の増幅器。
- 複数のトランジスタセルと、ゲートパッドと、ドレインパッドを有するトランジスタチップと、
表面にメタルパターンが形成され、前記メタルパターンの幅は前記ゲートパッドの幅又は前記ドレインパッドの幅より大きい整合基板と、
端子と、
前記端子と前記メタルパターンを接続する複数の端子ワイヤと、
前記メタルパターンと前記トランジスタチップを接続する複数のチップワイヤと、を備え、
複数の前記チップワイヤの前記メタルパターンに接続された部分のワイヤ間距離よりも、複数の前記チップワイヤの前記トランジスタチップに接続された部分のワイヤ間距離が大きいことを特徴とする増幅器。 - 前記整合基板は、入力整合基板と、出力整合基板とを有し、
前記端子は、入力端子と、出力端子とを有し、
複数の前記端子ワイヤは、前記入力端子と前記入力整合基板を接続する複数の第1ワイヤと、前記出力整合基板と前記出力端子を接続する複数の第4ワイヤとを有し、
複数の前記チップワイヤは、前記入力整合基板と前記トランジスタチップを接続する複数の第2ワイヤと、前記トランジスタチップと前記出力整合基板を接続する複数の第3ワイヤと、を有することを特徴とする請求項6に記載の増幅器。 - 複数の前記チップワイヤは端に近いワイヤほどワイヤ長が長いことを特徴とする請求項6に記載の増幅器。
- 複数の前記チップワイヤは非平行に設けられたことを特徴とする請求項8に記載の増幅器。
- 複数の前記チップワイヤと前記メタルパターンとの接続点は、前記メタルパターンの幅をXbとしたとき、前記メタルパターンの幅方向の一端から前記メタルパターンの幅方向の他端へXb/4進んだ場所と、前記他端から前記一端へXb/4進んだ場所との間だけにあることを特徴とする請求項6~9のいずれか1項に記載の増幅器。
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JP2019518682A JP6849060B2 (ja) | 2017-05-17 | 2017-05-17 | 増幅器 |
US16/603,839 US11164828B2 (en) | 2017-05-17 | 2017-05-17 | Amplifier |
PCT/JP2017/018581 WO2018211643A1 (ja) | 2017-05-17 | 2017-05-17 | 増幅器 |
DE112017007548.3T DE112017007548T5 (de) | 2017-05-17 | 2017-05-17 | Verstärker |
CN201780090719.0A CN110622286A (zh) | 2017-05-17 | 2017-05-17 | 放大器 |
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JP2017059650A (ja) * | 2015-09-16 | 2017-03-23 | 三菱電機株式会社 | 増幅器 |
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