IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0188005
(2005-07-25)
|
등록번호 |
US-7352591
(2008-04-01)
|
우선권정보 |
JP-2004-220202(2004-07-28) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Brother Kogyo Kabushiki Kaisha
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
21 인용 특허 :
5 |
초록
▼
A substrate mounted with an electronic element thereon comprises a metal base, a ceramic insulator, and a radiator. The insulator is provided on a first side of the base. The insulator has a heat-generating electronic element mounted on a side thereof opposite to a side thereof facing the first side
A substrate mounted with an electronic element thereon comprises a metal base, a ceramic insulator, and a radiator. The insulator is provided on a first side of the base. The insulator has a heat-generating electronic element mounted on a side thereof opposite to a side thereof facing the first side of the base. The radiator has a radiation capability higher than both of a radiation capability of the insulator and a radiation capability of the base, and radiates heat transmitted from the electronic element via the insulator to the base.
대표청구항
▼
What is claimed is: 1. A substrate mounted with an electronic element thereon, the substrate comprising: a metal base; a ceramic insulator provided on a first side of the base, the insulator having a heat-generating electronic element mounted on a side thereof opposite to a side thereof facing the
What is claimed is: 1. A substrate mounted with an electronic element thereon, the substrate comprising: a metal base; a ceramic insulator provided on a first side of the base, the insulator having a heat-generating electronic element mounted on a side thereof opposite to a side thereof facing the first side of the base; and a radiator configured to radiate heat transmitted from the electronic element via the insulator to the base, wherein the radiator includes a fluid passage that is formed within the base, and not within the insulator, to have liquid flowing therethrough. 2. The substrate according to claim 1, wherein a wiring that is connected to a terminal of the electronic element is provided on the side of the insulator on which the electronic element is mounted. 3. The substrate according to claim 1, wherein the radiator includes a member having a plurality of protrusions, the member disposed on any one of a second side of the base opposite to the first side and the side of the insulator on which the electronic element is mounted. 4. The substrate according to claim 3, wherein the member is disposed on the side of the insulator on which the electronic element is mounted so as to be adjacent to the electronic element. 5. The substrate according to claim 1, wherein the fluid passage forms a closed loop. 6. The substrate according to claim 1, wherein the fluid passage goes through a region which corresponds to the electronic element with respect to a direction perpendicular to the first side. 7. The substrate according to claim 6, wherein the liquid within the fluid passage is in contact with a part of the side of the insulator facing the first side of the base, the part corresponding to the electronic element with respect to the direction perpendicular to the first side. 8. The substrate according to claim 1, wherein at least a part of a face defining the fluid passage is uneven. 9. The substrate according to claim 8, wherein: the base includes a plurality of plates which are put in layers in their thickness direction; and the fluid passage includes a through hole which is formed through a thickness of at least one of the plurality of plates and a plurality of recesses which are formed in a plate neighboring the plate through which the through hole is formed so as to correspond to the through hole. 10. The substrate according to claim 8, wherein a part of the face defining the fluid passage near to the electronic element is uneven. 11. The substrate according to claim 1, wherein the radiator further includes a member having a plurality of protrusions, the member disposed on any one of a second side of the base opposite to the first side and the side of the insulator on which the electronic element is mounted. 12. The substrate according to claim 11, wherein the member is disposed at a portion corresponding to the fluid passage with respect to a direction perpendicular to the first side. 13. The substrate according to claim 12, wherein the liquid within the fluid passage is in contact with a part of the side of the insulator facing the first side of the base, the part corresponding to the member with respect to the direction perpendicular to the first side. 14. The substrate according to claim 12, wherein a part of a face defining the fluid passage near to the member is uneven. 15. The substrate according to claim 12, wherein the member is disposed at a portion corresponding via the fluid passage to the electronic element with respect to the direction perpendicular to the first side. 16. The substrate according to claim 1, wherein: the base includes a plurality of plates members which are put in layers in their thickness direction; and the fluid passage extends over two or more of the plurality of plates. 17. The substrate according to claim 1, further comprising: a pressurizer that applies pressure to the liquid within the fluid passage; and a controller that controls pressure application by the pressurizer to the liquid within the fluid passage. 18. The substrate according to claim 17, wherein: the pressurizer has a pressurizing chamber that is formed within the fluid passage and a piezoelectric actuator that changes the volume of the pressurizing chamber; and the piezoelectric actuator is connected to the controller, and has a first electrode, a piezoelectric layer, and a second electrode, the first electrode being formed on the side of the insulator on which the electronic element is mounted so as to correspond to the pressurizing chamber with respect to a direction perpendicular to the first side, the piezoelectric layer being formed on a side of the first electrode opposite to a side thereof facing the insulator, the second electrode being formed on a side of the piezoelectric layer opposite to a side thereof facing the first electrode. 19. The substrate according to claim 1, further comprising, within the fluid passage, a flow regulator that forms a region in which a resistance to flow along one direction is higher than a resistance to flow along a direction opposite to the one direction. 20. The substrate according to claim 1, wherein a thickness of the insulator is smaller than a thickness of the base. 21. The substrate according to claim 1, wherein a thermal-conductive material is interposed between the electronic element and the insulator. 22. A substrate mounted with an electronic element thereon, the substrate comprising: a metal base; a ceramic insulator provided on a first side of the base, the insulator having a heat-generating electronic element mounted on a side thereof opposite to a side thereof facing the first side of the base; and a fluid passage that is formed within the base to have liquid flowing therethrough, and radiates heat transmitted from the electronic element via the insulator to the base, wherein the first side of the base is inteposed between the fluid passage and the insulator. 23. A liquid ejection head mounted with an electronic element thereon, the liquid ejection head comprising: a passage unit including a plurality of nozzles that eject liquid and pressure chambers that communicate with the respective nozzles; an actuator unit that changes the volume of the pressure chambers; and a ceramic insulator provided on a first side of the passage unit, the insulator having a driver that drives the actuator unit mounted on a side thereof opposite to a side thereof facing the first side of the passage unit; a radiator configured to radiate heat transmitted from the electronic element via the insulator to the passage unit, wherein: the passage unit includes a plurality of metallic plates that are put in layers to constitute a first fluid passage which extends through the pressure chamber to the nozzle; the actuator unit includes a metal diaphragm and a ceramic insulator, the diaphragm being disposed on a surface of one of the metallic plates of the passage unit so as to cover the pressure chamber, the insulator being provided on a side of the diaphragm opposite to a side thereof facing the surface of the one metallic plate; the driver is mounted on a side of the insulator opposite to a side thereof facing the diaphragm; and a second fluid passage, as the radiator, having liquid flowing therethrough is formed at a portion within the metallic plates corresponding to the driver with respect to a direction perpendicular to the surface of the one metallic plate. 24. The substrate according to claim 23, wherein the liquid within the first and second fluid passages is ink. 25. The substrate according to claim 23, further comprising a controller that controls flow of the liquid within the second fluid passage so that a radiation capability of the second fluid passage can exceed both of a radiation capability of the insulator and a radiation capability of an assembly of the layered metallic plates. 26. A substrate mounted with an electronic element thereon, the substrate comprising: a metal base; a ceramic insulator provided on a first side of the base, the insulator having a heat-generating electronic element mounted on a side thereof opposite to a side thereof facing the first side of the base; a radiator configured to radiate heat transmitted from the electronic element via the insulator to the base, wherein the radiator includes a fluid passage that is formed within the base to have liquid flowing therethrough; a pressurizer configured to apply pressure to the liquid within the fluid passage, wherein the pressurizer includes: a pressurizing chamber that is formed within the fluid passage, and a piezoelectric actuator configured to change the volume of the pressurizing chamber; and a controller configured to control pressure application by the pressurizer to the liquid within the fluid passage, wherein the piezoelectric actuator is connected to the controller, and has a first electrode, a piezoelectric layer, and a second electrode, the first electrode being formed on the side of the insulator on which the electronic element is mounted so as to correspond to the pressurizing chamber with respect to a direction perpendicular to the first side, the piezoelectric layer being formed on a side of the first electrode opposite to a side thereof facing the insulator, the second electrode being formed on a side of the piezoelectric layer opposite to a side thereof facing the first electrode.
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