CN204577433U - The GaAs based Schottky frequency doubled diode of a kind of many beam leads - Google Patents
The GaAs based Schottky frequency doubled diode of a kind of many beam leads Download PDFInfo
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- CN204577433U CN204577433U CN201520253437.6U CN201520253437U CN204577433U CN 204577433 U CN204577433 U CN 204577433U CN 201520253437 U CN201520253437 U CN 201520253437U CN 204577433 U CN204577433 U CN 204577433U
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Abstract
The utility model discloses the GaAs based Schottky frequency doubled diode of a kind of many beam leads, relate to technical field of semiconductor device; Comprise GaAs based Schottky frequency doubled diode body, the two ends of GaAs based Schottky frequency doubled diode body are equipped with many beam leads, described many beam leads comprise at least two beam type lead-in wires that one end links together, and the thickness of described beam type lead-in wire is 2 μm-4 μm.The utility model can provide safeguard on circuit for Schottky frequency doubled diode normal mounting, improve the safety and reliability of Schottky frequency doubled diode, mounting finished product rate is high, installation quality can be guaranteed, greatly reduce production and scientific research cost, structure is simple, easy to use, extends the useful life of diode.
Description
Technical field
The utility model relates to technical field of semiconductor device.
Background technology
Terahertz (THz) ripple refers to the electromagnetic wave of frequency within the scope of 0.3-3THz, and the THz wave frequency of broad sense refers to 100GHz to 10THz, wherein 1THz=1000GHz.THz ripple occupies very special position in electromagnetic spectrum, and THz technology is the very important intersection Disciplinary Frontiers that International Technology circle is generally acknowledged.
In THz frequency low end range, semiconductor device frequency-doubling method is usually adopted to obtain Solid Source.The method be by millimeter wave by non-linear semiconductor device frequency multiplication to THz frequency range, there is compact conformation, be easy to regulate, the life-span is long, the advantages such as waveform is controlled, normal temperature work.Current short wavelength's submillimeter wave, THz Solid Source mainly rely on the mode of frequency multiplication to obtain.Not only circuit structure is simple, shg efficiency is higher to utilize schottky diode device to realize efficient frequency multiplication, also has the advantage of higher output power that oscillation source has, frequency multiplication amplifier chain high frequency stability, low phase noise concurrently; Simultaneously schottky diode device Absorbable organic halogens works in the whole millimeter of 30GHz ~ 3000GHz and involves submillimeter wave frequency range.The variable capacitance diode of current advanced person research institutions such as (produce) RAL and VDI can work in 3.1THz, has good continuous wave power and efficiency.Therefore the efficient frequency doubling technology of Schottky diode is very suitable for high performance millimeter wave, submillimeter wave, THz system, is a kind of THz frequency source technology having research, using value.Owing to having minimum junction capacitance and series resistance, high electron drift velocity, planar GaAs Schottky diode is widely used in THz frequency range, is the solid electronic device of core in THz technical field.
GaAs base Terahertz frequency multiplication Schottky diode conventional at present, mainly contain two kinds of forms, one is the Schottky diode not having beam lead (beam), this diode is when assembling, directly circuit is connected with the pressure point (Pad) of diode, because the Pad stock size of diode is less, when face-down bonding, difficulty is larger.In order to reduce the difficulty of diode when face-down bonding, develop the GaAs base Terahertz frequency multiplication Schottky diode with beam lead, with the Schottky diode of beam lead, which reduce the difficulty of diode face-down bonding, but the beam lead of Schottky diode is all at diode two ends at present, the metal stretched by a fritter is as beam, and traditional beam lead 10 as shown in Figure 1.The beam of this diode is in practical operation, clamp due to instrument will be used, in assembling process, be easy to bend, fracture, once there be one end beam to go wrong, cause device can not normal mounting on circuit, device will be caused to cancel, due to current high performance frequency multiplication Schottky diode costly, this adds the expenditure of scientific research cost to a certain extent.
Utility model content
Technical problem to be solved in the utility model is to provide the GaAs based Schottky frequency doubled diode of a kind of many beam leads, can provide safeguard on circuit for Schottky frequency doubled diode normal mounting, improve the safety and reliability of Schottky frequency doubled diode, mounting finished product rate is high, can guarantee installation quality, greatly reduce production and scientific research cost, structure is simple, easy to use, extend the useful life of diode.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
The GaAs based Schottky frequency doubled diode of a kind of many beam leads, comprise GaAs based Schottky frequency doubled diode body, the two ends of GaAs based Schottky frequency doubled diode body are equipped with many beam leads, and described many beam leads comprise at least two beam type lead-in wires that one end links together; The thickness of described beam type lead-in wire is 2 μm-4 μm, to ensure that beam lead has enough mechanical strengths, avoids being bent, fractureing.
Further technical scheme, described GaAs based Schottky frequency doubled diode body comprises SI-substrate layer, be produced on the passivation layer on SI-substrate layer, the heavy doping GaAs layer of SI-substrate layer Epitaxial growth, at the low-doped GaAs layer of heavy doping GaAs layer Epitaxial growth, be produced on the Schottky contact metal layer on low-doped GaAs layer, be produced on the ohmic contact metal layer on heavy doping GaAs layer, be produced on the metal thickening layer that can be connected with beam lead on ohmic contact metal layer, be positioned at the silicon dioxide layer above low-doped GaAs layer, metal thickening layer connects Schottky contact metal by air bridges.
Further technical scheme, described many beam leads comprise two lead-in wires being positioned at same level.
Further technical scheme, the angle between described outermost two beam type lead-in wires is 30 °-60 °.
Further technical scheme, the length of every bar beam type lead-in wire is 75 μm-150 μm.
Further technical scheme, described many beam leads and metal thickening layer be connected to air bridges be connected complete after through photoetching, electroplate and make.
Further technical scheme, described many beam leads composition is gold.
Further technical scheme, every bar beam type lead-in wire is cuboid.
Further technical scheme, described passivation layer is silicon dioxide, silicon nitride or diamond, and described ohmic contact metal layer is Ni/Au/ Ge/Ni/Au from bottom to top.
Further technical scheme, the composition of described metal thickening layer is Au, and Schottky contact metal layer is Ti/Pt/Au from bottom to top.
The beneficial effect adopting technique scheme to produce is: two beam type lead-in wires are stretched out at a pressure point place of same one end of GaAs based Schottky frequency doubled diode of the present utility model, when diode is carried out erection welding, if one bar beam type lead-in wire bends or fractures, another beam type lead-in wire of same one end can be used to carry out erection welding as spare lead wire, for Schottky frequency doubled diode normal mounting provides guarantee on circuit, improve the safety and reliability of Schottky frequency doubled diode, mounting finished product rate is high, installation quality can be guaranteed, greatly reduce production and scientific research cost, structure is simple, easy to use, extend the useful life of diode.
Accompanying drawing explanation
Fig. 1 is the vertical view of traditional GaAs based Schottky frequency doubled diode;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is the profile of A-A in Fig. 2;
In the accompanying drawings: 1, passivation layer, 2, silicon dioxide layer, 3, ohmic contact metal layer, 4, metal thickening layer, 5, SI-substrate layer, 6, heavy doping GaAs layer, 7, low-doped GaAs layer, 8, Schottky contact metal layer, 9, many beam leads, 10, traditional beam lead.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 2, the GaAs based Schottky frequency doubled diode of a kind of many beam leads, comprises GaAs based Schottky frequency doubled diode body, and the two ends of GaAs based Schottky frequency doubled diode body are equipped with many beam leads 9, and many beam lead 9 compositions are gold.Many beam leads 9 comprise two beam type lead-in wires that one end links together, and every bar beam type lead-in wire is cuboid, and two beam type lead-in wires are positioned at same level.The thickness of beam type lead-in wire is 2 μm-4 μm, and length is 75 μm-150 μm, and the angle between outermost two beam type lead-in wires is 30 °-60 °.
As shown in Figure 3, GaAs based Schottky frequency doubled diode body comprises SI-substrate layer 5, be produced on the passivation layer 1 on SI-substrate layer 5, the heavy doping GaAs layer 6 of SI-substrate layer 5 Epitaxial growth, at the low-doped GaAs layer 7 of heavy doping GaAs layer 6 Epitaxial growth, be produced on the Schottky contact metal layer 8 on low-doped GaAs layer 7, be produced on the ohmic contact metal layer 3 on heavy doping GaAs layer 6, be produced on the metal thickening layer 4 that can be connected with beam lead on ohmic contact metal layer 3, be positioned at the silicon dioxide layer 2 above low-doped GaAs layer 7, metal thickening layer 4 connects Schottky contact metal 8 by air bridges.Passivation layer 1 is silicon dioxide, silicon nitride or diamond, and ohmic contact metal layer 3 is Ni/Au/ Ge/Ni/Au from bottom to top.The composition of metal thickening layer 4 is Au, and Schottky contact metal layer 8 is Ti/Pt/Au from bottom to top.
Terahertz Schottky frequency doubled diode described in the utility model realizes by the Schottky diode processing technology of maturation, the manufacturing technology of current Schottky diode is all ripe at home and abroad, comprise cathode ohmic contact, anode Schottky evaporation of metal, air bridges connects and isolation channel corrosion, makes passivation layer 1.After front processing technology completes, carry out the thinning of the back side and burst, produce Terahertz Schottky diode.Many beam leads 9 and metal thickening layer 4 be connected to air bridges be connected complete after through photoetching, electroplate and make.
When practical operation, use sub lead-in wire of a beam type of every one end to carry out erection welding, once bending, rupturing and can not normally use appears in a certain bar beam type lead-in wire, then another spare beam formula of same one end can be utilized to go between and carry out erection welding.The percent defective produced in original assembling 30% can be reduced to 10% like this, thus ensure that Schottky frequency doubled diode normal mounting is on circuit, ensure that installation quality, greatly reduce production and scientific research cost.
Claims (10)
1. the GaAs based Schottky frequency doubled diode of beam lead more than a kind, comprise GaAs based Schottky frequency doubled diode body, it is characterized in that the two ends of GaAs based Schottky frequency doubled diode body are equipped with many beam leads (9), described many beam leads (9) comprise at least two beam type lead-in wires that one end links together, and the thickness of described beam type lead-in wire is 2 μm-4 μm.
2. the GaAs based Schottky frequency doubled diode of the many beam leads of one according to claim 1, it is characterized in that described GaAs based Schottky frequency doubled diode body comprises SI-substrate layer (5), be produced on the passivation layer (1) on SI-substrate layer (5), the heavy doping GaAs layer (6) of SI-substrate layer (5) Epitaxial growth, the low-doped GaAs layer (7) of heavy doping GaAs layer (6) Epitaxial growth, be produced on the Schottky contact metal layer (8) on low-doped GaAs layer (7), be produced on the ohmic contact metal layer (3) on heavy doping GaAs layer (6), be produced on the metal thickening layer (4) that can be connected with beam lead on ohmic contact metal layer (3), be positioned at the silicon dioxide layer (2) of low-doped GaAs layer (7) top, metal thickening layer (4) connects Schottky contact metal (8) by air bridges.
3. the GaAs based Schottky frequency doubled diode of the many beam leads of one according to claim 1, is characterized in that described many beam leads (9) comprise two lead-in wires being positioned at same level.
4. the GaAs based Schottky frequency doubled diode of the many beam leads of one according to claim 1, is characterized in that the angle between described outermost two beam type lead-in wires is 30 °-60 °.
5. the GaAs based Schottky frequency doubled diode of the many beam leads of one according to claim 1, is characterized in that the length of every bar beam type lead-in wire is 75 μm-150 μm.
6. the GaAs based Schottky frequency doubled diode of the many beam leads of one according to claim 1, it is characterized in that described many beam leads (9) and metal thickening layer (4) be connected to air bridges be connected complete after through photoetching, electroplate and make.
7. the GaAs based Schottky frequency doubled diode of the many beam leads of one according to claim 1, is characterized in that described many beam leads (9) composition is for gold.
8. the GaAs based Schottky frequency doubled diode of the many beam leads of one according to claim 1, is characterized in that every bar beam type lead-in wire is cuboid.
9. the GaAs based Schottky frequency doubled diode of the many beam leads of one according to claim 2, it is characterized in that described passivation layer (1) is silicon dioxide, silicon nitride or diamond, described ohmic contact metal layer (3) is Ni/Au/ Ge/Ni/Au from bottom to top.
10. the GaAs based Schottky frequency doubled diode of the many beam leads of one according to claim 2, it is characterized in that the composition of described metal thickening layer (4) is Au, Schottky contact metal layer (8) is Ti/Pt/Au from bottom to top.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795453A (en) * | 2015-04-24 | 2015-07-22 | 中国电子科技集团公司第十三研究所 | Gallium arsenide-based Schottky frequency-doubling diode with multi-beam leads |
| CN106130486A (en) * | 2016-07-29 | 2016-11-16 | 中国电子科技集团公司第十三研究所 | W-waveband and Terahertz frequency low side doubler |
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2015
- 2015-04-24 CN CN201520253437.6U patent/CN204577433U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795453A (en) * | 2015-04-24 | 2015-07-22 | 中国电子科技集团公司第十三研究所 | Gallium arsenide-based Schottky frequency-doubling diode with multi-beam leads |
| CN104795453B (en) * | 2015-04-24 | 2018-06-12 | 中国电子科技集团公司第十三研究所 | A kind of more beam lead GaAs base schottky frequency doubled diodes |
| CN106130486A (en) * | 2016-07-29 | 2016-11-16 | 中国电子科技集团公司第十三研究所 | W-waveband and Terahertz frequency low side doubler |
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