Bidirectional switch and bidirectional switch device including the switch
A bidirectional switch includes: a first lateral transistor including a first semiconductor layer on the surface of a first conductive layer; a second lateral transistor including a second semiconductor layer on the surface of a second conductive layer; a connection member; a first conductor member; and a second conductor member. The connection member connects the first lateral transistor and the second lateral transistor together in anti-series. The first conductor member electrically connects the first source electrode of the first lateral transistor to the first conductive layer. The second conductor member electrically connects the second source electrode of the second lateral transistor to the second conductive layer.
1. A bidirectional switch comprising:
a first conductive layer having a surface and a back surface that are located opposite from each other along thickness of the first conductive layer;
a second conductive layer having a surface and a back surface that are located opposite from each other along thickness of the second conductive layer;
a first lateral transistor including a first semiconductor layer, a first source electrode, a first gate electrode, and a first drain electrode, the first semiconductor layer being arranged on the surface of the first conductive layer, the first source electrode, the first gate electrode, and the first drain electrode being all arranged on one surface of the first semiconductor layer, the one surface of the first semiconductor layer being opposite from the other surface of the first semiconductor layer in contact with the first conductive layer;
a second lateral transistor including a second semiconductor layer, a second source electrode, a second gate electrode, and a second drain electrode, the second semiconductor layer being arranged on the surface of the second conductive layer, the second source electrode, the second gate electrode, and the second drain electrode being all arranged on one surface of the second semiconductor layer, the one surface of the second semiconductor layer being opposite from the other surface of the second semiconductor layer in contact with the second conductive layer;
a connection member connecting the first lateral transistor and the second lateral transistor together in anti-series;
a first conductor member directly connecting the first source electrode of the first lateral transistor to the first conductive layer; and
a second conductor member directly connecting the second source electrode of the second lateral transistor to the second conductive layer.
2. The bidirectional switch of claim 1 , wherein
the first conductive layer includes: a first conductive die; and a first substrate with electrical conductivity, the first substrate being located between the first conductive die and the first semiconductor layer along thickness of the first conductive layer, the first substrate being bonded to the first conductive die,
the first source electrode being electrically connected to the first conductive die and also electrically connected to the first substrate via the first conductive die,
the second conductive layer includes: a second conductive die; and a second substrate with electrical conductivity, the second substrate being located between the second conductive die and the second semiconductor layer along thickness of the second conductive layer, the second substrate being bonded to the second conductive die,
the second source electrode being electrically connected to the second conductive die and also electrically connected to the second substrate via the second conductive die.
3. The bidirectional switch of claim 1 , wherein
the connection member connects the first lateral transistor and the second lateral transistor together in anti-series by electrically connecting the first drain electrode and the second drain electrode together.
4. The bidirectional switch of claim 1 , wherein
the connection member connects the first lateral transistor and the second lateral transistor together in anti-series by electrically connecting the first source electrode and the second source electrode together.
5. The bidirectional switch of claim 1 , wherein
the first conductor member and the second conductor member are each implemented as a wire.
6. The bidirectional switch of claim 1 , wherein
the first conductor member and the second conductor member are each implemented as a conductor layer.
7. The bidirectional switch of claim 3 , wherein
the connection member includes: a conductive substrate facing the back surface of the first conductive layer and the back surface of the second conductive layer; a wire connecting the first drain electrode to the conductive substrate; and another wire connecting the second drain electrode to the conductive substrate, and
the bidirectional switch further includes: a first electrical insulating layer provided between the first conductive layer and the conductive substrate; and a second electrical insulating layer provided between the second conductive layer and the conductive substrate.
8. The bidirectional switch of claim 1 , wherein
the connection member is implemented as a conductor layer.
9. A bidirectional switch device comprising:
the bidirectional switch of claim 1 ;
a first gate terminal electrically connected to the first gate electrode;
a second gate terminal electrically connected to the second gate electrode; and
a package body housing the first gate terminal, the second gate terminal, and at least a part of the bidirectional switch.
10. The bidirectional switch device of claim 9 , wherein
the first conductor member of the bidirectional switch is partially located outside of the package body, and
the second conductor member of the bidirectional switch is partially located outside of the package body.
11. The bidirectional switch of claim 2 , wherein
the connection member connects the first lateral transistor and the second lateral transistor together in anti-series by electrically connecting the first drain electrode and the second drain electrode together.
12. The bidirectional switch of claim 2 , wherein
the connection member connects the first lateral transistor and the second lateral transistor together in anti-series by electrically connecting the first source electrode and the second source electrode together.
13. The bidirectional switch of claim 2 , wherein
the first conductor member and the second conductor member are each implemented as a wire.
14. The bidirectional switch of claim 3 , wherein
the first conductor member and the second conductor member are each implemented as a wire.
15. The bidirectional switch of claim 4 , wherein
the first conductor member and the second conductor member are each implemented as a wire.
16. The bidirectional switch of claim 2 , wherein
the first conductor member and the second conductor member are each implemented as a conductor layer.
17. The bidirectional switch of claim 3 , wherein
the first conductor member and the second conductor member are each implemented as a conductor layer.
18. The bidirectional switch of claim 4 , wherein
the first conductor member and the second conductor member are each implemented as a conductor layer.
19. The bidirectional switch of claim 2 , wherein
the connection member is implemented as a conductor layer.
20. The bidirectional switch of claim 3 , wherein
the connection member is implemented as a conductor layer.