CN100391067C - Heat sink of encapsulation through high frequency in use for semiconductor laser modulated by electrical absorption - Google Patents
Heat sink of encapsulation through high frequency in use for semiconductor laser modulated by electrical absorption Download PDFInfo
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- CN100391067C CN100391067C CNB2005100906430A CN200510090643A CN100391067C CN 100391067 C CN100391067 C CN 100391067C CN B2005100906430 A CNB2005100906430 A CN B2005100906430A CN 200510090643 A CN200510090643 A CN 200510090643A CN 100391067 C CN100391067 C CN 100391067C
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- heat sink
- transmission line
- microwave transmission
- dielectric heat
- semiconductor laser
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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Abstract
The heat sink includes following parts: a basal piece of dielectric heat sink; being prepared on one side of up surface on the basal piece of dielectric heat sink, a microwave transmission line forms three endpoints on the said up surface; being prepared up surface on the basal piece of dielectric heat sink, a film resistor is formed on tail end of endpoint in microwave transmission line; multiple pieces of metal electrodes are prepared on the other side of up surface on the basal piece of dielectric heat sink; being prepared on the low surface of basal piece of dielectric heat sink, an earthed electrode covers the low surface of basal piece of dielectric heat sink.
Description
Technical field:
The invention belongs to field of optoelectronic devices, is a kind of the heat sink of opto-electronic device encapsulation that be used for, a kind of the heat sink of electro-absorption modulation semiconductor laser high-frequency encapsulation that be used for of more specifically saying so.
Background technology:
Monolithic integrated (EML) light source of electroabsorption modulator (EAM) and distributed feedback laser (DFB LD), low warble because of possessing, little operating voltage, size are little, coupling efficiency height, big, the low cost and other advantages of Output optical power between compact conformation, reliability height, device, be wdm optical communication system, the perfect light source of especially long distance High-speed rate fiber optic network.After the photoelectric device chip manufacturing finished, encapsulation was whether device performance is fully realized and brought into play, the key that can device practicability, and the signal of telecommunication is introduced and is distributed, the coupling of light energy, module protection, constant temperature heat radiation etc. all depends on device package to a certain extent.Heat sink direct carrier during as the photoelectric device die package mainly solves electrical connection problems such as the introducing of the heat radiation of tube core and the signal of telecommunication and distribution.For the encapsulation of the photoelectric device of high-frequency work, because signal rate is very high, wavelength is very short, the electromagnetic radiation that causes, and the influence of loss and interference is serious.At this moment have good high-frequency microwave transmission performance, can be with the high frequency electrical signal high efficiency of signal source output, low reflection, low-loss P that is transferred to the photoelectric device tube core of high-frequency work, N electrode two ends heat sink most important.General photoelectric device tube core P, N electrode be coplane not, lays respectively at the upper and lower surface of tube core.Normally the bottom electrode of tube core is welded on the heat sink electrode, the top electrode of tube core then is connected to heat sink going up on the other electrode by spun gold, and then with spun gold heat sink electrode is connected with external circuit respectively.For the photoelectric device of high-frequency work, the spun gold diameter is subjected to the restriction of top electrode size, diameter less (Φ＜25 μ m), and inductive effect is (about 1nh/mm) obviously.Spun gold is long more, and number is many more, and the parasitic parameter of introducing is big more, and the lossy microwave that causes is serious more, will influence the high frequency performance of entire device package module.So,, adopt SMA or GPO radio frequency connector being connected as the signal electrode on heat sink and outer, coaxial cable signal incoming line for the encapsulation of operating frequency greater than the photoelectric device of 2.5GHz more.
Summary of the invention
The objective of the invention is to, a kind of the heat sink of electro-absorption modulation semiconductor laser high-frequency encapsulation that be used for is provided, high-frequency signal transmission wire on this is heat sink adopts co-planar waveguide (CPW) transmission line of 50 Ω characteristic impedances, the CPW size design of signal input part is suitable for being connected with SMA or GPO radio frequency connector, has 50 Ω matched load resistances at signal output part.And, shortened top electrode spun gold length greatly in the CPW of tube core welding portion size design, fully reduced of the influence of spun gold parasitic parameter to high frequency characteristics.
Technical scheme of the present invention is:
The present invention is a kind of the heat sink of electro-absorption modulation semiconductor laser high-frequency encapsulation that be used for, it is characterized in that, comprising:
One dielectric heat sink substrate;
One microwave transmission line, this microwave transmission line are produced on a side of the upper surface of dielectric heat sink substrate, and this microwave transmission line forms three end points at the upper surface of dielectric heat sink substrate;
One film resistor, this film resistor is produced on the upper surface of dielectric heat sink substrate, is formed on the tail end of the end points of microwave transmission line;
Many strip metals electrode, this many strip metals electrode is produced on the opposite side of the upper surface of dielectric heat sink substrate;
One ground electrode, this ground electrode is produced on the lower surface of dielectric heat sink substrate, and the lower surface of dielectric heat sink substrate is covered.
Wherein microwave transmission line adopts coplanar waveguide transmission line, and its impedance is 50 Ω.
Wherein begin at the microwave transmission line input one section, the width of holding wire is changeless, and width is about 400 microns, so that with the signal terminal welding at SMA or GPO radio frequency connector center, the gap width between holding wire and ground wire also immobilizes; The stage casing of microwave transmission line is continuous linear gradient, is symmetric wedge, width is gradient to about 100 microns from 400 microns continuous linearities, and the gap width between synchronous signal line and ground wire also is continuous non-linear gradual change; The rear end of microwave transmission line is one section coplanar waveguide transmission line that has the right-angle bending turning, and the width of holding wire is 100 microns and immobilizes that the gap width between synchronous signal line and ground wire also immobilizes; This microwave transmission line right angle corner adopts the corner cut collocation structure.
The terminal matched load resistance of the coplanar waveguide transmission line that wherein said microwave transmission line adopts is a film resistor, and material is tantalum nitride or nichrome.
Wherein handle through craft of gilding on the surface of microwave transmission line, metal electrode and ground electrode.
What wherein the dielectric heat sink substrate was adopted is aluminium nitride or aluminium oxide or carborundum or beryllium oxide or beryllium nitride or diamond.
The invention has the beneficial effects as follows: the heat sink high frequency electrical signal that can realize importing of design obtains big electric response to the interelectrode high efficiency of transmission of electroabsorption modulator P, N at electroabsorption modulator P, N electrode two ends; Realize that heat sink microwave transmission line is connected with the low-loss of radio frequency connector; Realize high frequency electrical signal along the microwave transmission line low-loss, the transmission of high-frequency response; Effectively shortened and be connected spun gold length between the holding wire of electroabsorption modulator upper surface electrode and coplanar waveguide transmission line, finally make package module obtain the little reflection parameter and the high frequency response of wide bandwidth, to improve the whole high frequency dynamic duty performance of package module.
Description of drawings
In order to further specify technology contents of the present invention, the invention will be further described below in conjunction with accompanying drawing, wherein:
Fig. 1 is a kind of heat sink vertical view that is used for electroabsorption modulator and the encapsulation of semiconductor laser integrated device high frequency of the present invention.
Fig. 2 is the end view of Fig. 1 at high frequency coplanar waveguide transmission line input.
Specific implementation method
See also Fig. 1 and Fig. 2, comprising:
One dielectric heat sink substrate 1, that this dielectric heat sink substrate 1 is adopted is aluminium nitride (AlN) or aluminium oxide (Al
2O
3) or carborundum (SiC) or beryllium oxide (BeO) or beryllium nitride (BN) or diamond, substrate material requires to have good electrical properties (little dielectric constant, low dielectric loss, good thermal characteristic, high heat conductance) and with the chip semi-conducting material than matched coefficient of thermal expansion, simultaneously, substrate evenness and roughness also there is requirement;
One microwave transmission line 2, this microwave transmission line 2 adopts coplanar waveguide transmission line (this coplanar waveguide transmission line also adopts label 2 expressions), co-planar waveguide (CPW) transmission line 2, the characteristic impedance of this co-planar waveguide (CPW) transmission line 2 is 50 Ω, middle metal electrode is the holding wire of coplanar waveguide transmission line 2, the metal electrode on both sides is the ground wire of coplanar waveguide transmission line 2, wherein: (1) a section of beginning at coplanar waveguide transmission line 2 inputs, the width w of holding wire is changeless, width w is about 400 microns, so that weld with the signal terminal at SMA or GPO radio frequency connector center, gap width g between holding wire and ground wire also immobilizes, and wherein the g value is determined by the requirement of 50 Ω characteristic impedances and the electrical properties of dielectric heat sink substrate 1; (2) ensuing one section coplanar waveguide transmission line 2, the width w of its holding wire is continuous linear gradient, be symmetric wedge, width w is gradient to about 100 microns from about 400 microns continuous linearities, gap width g between synchronous signal line and ground wire is continuous non-linear gradual change, and the variation of width g is determined by the requirement of 50 Ω characteristic impedances and the electrical properties of dielectric heat sink substrate 1; (3) next be one section coplanar waveguide transmission line 2 that has rectangular bent corners, the width w of holding wire is about 100 microns and immobilizes, gap width g between synchronous signal line and ground wire also immobilizes, and its value g is determined by the requirement of 50 Ω characteristic impedances and the electrical properties of dielectric heat sink substrate 1.Coplanar waveguide transmission line 2 right angle corner adopt the corner cut collocation structure; This microwave transmission line 2 forms three end points 21,22,23 at the upper surface of dielectric heat sink substrate 1; (4) metal level is Ti 300-500
/ Au 1.5-3 μ m or TiW 300-500
/ Ni 1000-2000
/ Au 1.5-3 μ m is to satisfy the demand of integrated chip weldering knot and spun gold pressure welding.
One film resistor 3, this film resistor are the terminal matched load resistance of co-planar waveguide (CPW) transmission line, and resistance is 50 Ω, and material is tantalum nitride (TaN) or nickel chromium triangle (NiCr) alloy;
One group of metal electrode 4, the introducing of dc signal when being used for the encapsulation of electroabsorption modulator and semiconductor laser integrated device high frequency, metal level is Ti 300-500
/ Au 1.5-3 μ m or TiW 300-500
/ Ni 1000-2000
/ Au 1.5-3 μ m is to satisfy the demand of spun gold pressure welding;
One ground electrode 5, this ground electrode covers the lower surface of whole dielectric heat sink substrate, and metal level is Ti 300-500
/ Au 1.5-3 μ m or TiW 300-500
/ Ni 1000-2000
/ Au 1.5-3 μ m is to satisfy the whole heat sink demand to the pedestal welding of collection.
Above-mentioned co-planar waveguide (CPW) transmission line 2, handle through craft of gilding on the surface of metal electrode 4 and ground electrode 5, gold plate thickness 1.5-3 μ m.
Claims (5)
1. one kind is used for the heat sink of electro-absorption modulation semiconductor laser high-frequency encapsulation, it is characterized in that, comprising:
One dielectric heat sink substrate;
One microwave transmission line, this microwave transmission line is produced on a side of the upper surface of dielectric heat sink substrate, this microwave transmission line forms three end points at the upper surface of dielectric heat sink substrate, wherein begin at the microwave transmission line input one section, the width of holding wire is changeless, width is about 400 microns, so that weld with the signal terminal at SMA or GPO radio frequency connector center, the gap width between holding wire and ground wire also immobilizes; The stage casing of microwave transmission line is continuous linear gradient, is symmetric wedge, and width is gradient to about 100 microns from 400 microns continuous linearities, and the gap width between synchronous signal line and ground wire is continuous non-linear gradual change; The rear end of microwave transmission line is one section coplanar waveguide transmission line that has the right-angle bending turning, and the width of holding wire is 100 microns and immobilizes that the gap width between synchronous signal line and ground wire also immobilizes; This microwave transmission line right angle corner adopts the corner cut collocation structure;
One film resistor, this film resistor is produced on the upper surface of dielectric heat sink substrate, is formed on the tail end of the end points of microwave transmission line;
Many strip metals electrode, this many strip metals electrode is produced on the opposite side of the upper surface of dielectric heat sink substrate;
One ground electrode, this ground electrode is produced on the lower surface of dielectric heat sink substrate, and the lower surface of dielectric heat sink substrate is covered.
2. the heat sink of electro-absorption modulation semiconductor laser high-frequency encapsulation that be used for as claimed in claim 1 is characterized in that wherein microwave transmission line adopts coplanar waveguide transmission line, and its impedance is 50 Ω.
3. the heat sink of electro-absorption modulation semiconductor laser high-frequency encapsulation that be used for as claimed in claim 2, it is characterized in that, the terminal matched load resistance of the coplanar waveguide transmission line that wherein said microwave transmission line adopts is a film resistor, and material is tantalum nitride or nichrome.
4. the heat sink of electro-absorption modulation semiconductor laser high-frequency encapsulation that be used for as claimed in claim 1 is characterized in that wherein handle through craft of gilding on the surface of microwave transmission line, metal electrode and ground electrode.
5. the heat sink of electro-absorption modulation semiconductor laser high-frequency encapsulation that be used for as claimed in claim 1 is characterized in that what wherein the dielectric heat sink substrate was adopted is aluminium nitride or aluminium oxide or carborundum or beryllium oxide or beryllium nitride or diamond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100906430A CN100391067C (en) | 2005-08-18 | 2005-08-18 | Heat sink of encapsulation through high frequency in use for semiconductor laser modulated by electrical absorption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100906430A CN100391067C (en) | 2005-08-18 | 2005-08-18 | Heat sink of encapsulation through high frequency in use for semiconductor laser modulated by electrical absorption |
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| Publication Number | Publication Date |
|---|---|
| CN1917311A CN1917311A (en) | 2007-02-21 |
| CN100391067C true CN100391067C (en) | 2008-05-28 |
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| CNB2005100906430A Expired - Fee Related CN100391067C (en) | 2005-08-18 | 2005-08-18 | Heat sink of encapsulation through high frequency in use for semiconductor laser modulated by electrical absorption |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527379B (en) * | 2009-03-30 | 2012-07-25 | 清华大学 | Microwave feeder unit used for sealing semiconductor electric absorption modulator |
| CN102324964A (en) * | 2011-05-18 | 2012-01-18 | 武汉电信器件有限公司 | Light transmitter with double-open-circuit short-knot matching network |
| CN102833950A (en) * | 2012-09-12 | 2012-12-19 | 中国电子科技集团公司第二十四研究所 | Substrate manufacture method for improving heat conduction and current passing capability |
| WO2014059632A1 (en) * | 2012-10-17 | 2014-04-24 | 华为技术有限公司 | Photoelectronic device |
| CN105977241B (en) * | 2016-05-25 | 2018-10-09 | 中国科学院半导体研究所 | A kind of encapsulating structure for optical-elec-tronic integrated chip |
| US10461384B2 (en) * | 2017-06-20 | 2019-10-29 | Raytheon Company | Frequency selective limiter |
| CN108447852A (en) * | 2018-04-19 | 2018-08-24 | 加特兰微电子科技(上海)有限公司 | A kind of millimeter wave chip-packaging structure and printed circuit board |
| JP2022518697A (en) * | 2019-01-15 | 2022-03-16 | スミスズ インターコネクト アメリカズ インコーポレイテッド | High frequency spiral termination device |
| CN111509542A (en) * | 2020-05-27 | 2020-08-07 | 大连优迅科技有限公司 | 18Ghz laser |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5729378A (en) * | 1995-11-10 | 1998-03-17 | Kokusai Densin Denwa Kabusiki Kaisha | Optical device |
| US20030007228A1 (en) * | 2001-07-04 | 2003-01-09 | Masataka Shirai | Optical modulator |
| US20030048147A1 (en) * | 2001-09-11 | 2003-03-13 | Miller Thomas James | Broadband matching network for an electroabsorption optical modulator |
| US20030147574A1 (en) * | 2001-12-03 | 2003-08-07 | Lam Yee Loy | Travelling-wave electroabsorption modulator |
| US20050058385A1 (en) * | 2003-08-18 | 2005-03-17 | Hassan Tanbakuchi | Low-pass filter transmission line with integral electroabsorption modulator |
-
2005
- 2005-08-18 CN CNB2005100906430A patent/CN100391067C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5729378A (en) * | 1995-11-10 | 1998-03-17 | Kokusai Densin Denwa Kabusiki Kaisha | Optical device |
| US20030007228A1 (en) * | 2001-07-04 | 2003-01-09 | Masataka Shirai | Optical modulator |
| US20030048147A1 (en) * | 2001-09-11 | 2003-03-13 | Miller Thomas James | Broadband matching network for an electroabsorption optical modulator |
| US20030147574A1 (en) * | 2001-12-03 | 2003-08-07 | Lam Yee Loy | Travelling-wave electroabsorption modulator |
| US20050058385A1 (en) * | 2003-08-18 | 2005-03-17 | Hassan Tanbakuchi | Low-pass filter transmission line with integral electroabsorption modulator |
Non-Patent Citations (2)
| Title |
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| InP基高速单片光子集成器件关键工艺的研究. 张立江.中国优秀博硕士学位论文全文数据库. 2005 * |
| NOVEL LOW-COST WIDEBANDSI-BASEDSUBMOUNTFOR 40 GB/S OPTOELECTRONICDEVICES. Bing Xiong,Jian Wang, PengFeiCai,JianBaiTian,ChangzhengSun, Yi Luo.MICROWAVE AND OPTICAL TECHNOLOGY LETTERS,Vol.45 No.1. 2005 * |
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|---|---|
| CN1917311A (en) | 2007-02-21 |
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Granted publication date: 20080528 |