CN114247994A - Box TOSA product whole-process stress release method - Google Patents
Box TOSA product whole-process stress release method Download PDFInfo
- Publication number
- CN114247994A CN114247994A CN202111645127.5A CN202111645127A CN114247994A CN 114247994 A CN114247994 A CN 114247994A CN 202111645127 A CN202111645127 A CN 202111645127A CN 114247994 A CN114247994 A CN 114247994A
- Authority
- CN
- China
- Prior art keywords
- temperature
- product
- tosa
- box
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 71
- 230000003287 optical effect Effects 0.000 claims abstract description 89
- 238000003466 welding Methods 0.000 claims abstract description 52
- 238000012360 testing method Methods 0.000 claims abstract description 30
- 230000004087 circulation Effects 0.000 claims abstract description 21
- 230000008878 coupling Effects 0.000 claims abstract description 19
- 238000010168 coupling process Methods 0.000 claims abstract description 19
- 238000005859 coupling reaction Methods 0.000 claims abstract description 19
- 230000008439 repair process Effects 0.000 claims abstract description 17
- 230000002950 deficient Effects 0.000 claims abstract description 16
- 230000008859 change Effects 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000012216 screening Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 26
- 238000003860 storage Methods 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention provides a BOX TOSA product whole-process stress release method, which comprises the following steps: 1) carrying out temperature control laser coupling welding, then carrying out temperature control testing on the optical power, and picking out the optical devices which are seriously stressed and have light falling exceeding the change range of a set value X for repairing; 2) performing high-low temperature circulation on qualified products for stress release, then performing temperature control light rate test and comparing with the last light power, and performing repair recoupling on products with the light power change exceeding a set value Y; 3) performing parallel seam welding on a qualified product, performing high-low temperature circulation after sealing welding for stress release, and then performing temperature control optical power test and comparing with the last optical power; products with optical power variation exceeding a set value Z are repaired and recoupled; thereby screening out the good products and the defective products. Coupling laser welding stress and parallel seal welding stress are released through stress release for 2 times, and the stability of optical power of the optical device is guaranteed, so that the performance stability of the optical device is guaranteed, and poor products are prevented from flowing into the market.
Description
Technical Field
The invention relates to the technical field of optical communication devices, in particular to a BOX TOSA product whole-process stress release method.
Background
At present, the demand of optical devices is continuously increased, the market demand is very large no matter communication optical devices or sensing optical devices, the current high-end optical devices are mainly packaged by a BOX (BOX optical transmitter optical subassembly), and the transmitting devices are mainly BOX TOSA (BOX optical transmitter optical subassembly).
No matter in the communication field or the sensing field, the performance requirements of the optical device are gradually improved, and the optical device with good photoelectric performance, high stability and good reliability is generally required. In operation, optical devices are required to have high performance mainly against light. In the current production of optical devices, the output performance of the optical devices can be ensured only by controlling the stability of optical power. In the production process of the BOX TOSA, the optical power stability is influenced mainly by the fact that the optical power changes greatly due to the internal stress of welding power, and a simple and reliable method for releasing the stress of a BOX TOSA product is urgently needed.
In the prior art, chinese patent with publication number CN 104846184 a discloses a method for releasing internal stress of TOSA laser welding, which only releases the internal stress of laser welding to determine that the product is qualified, and in fact, no matter laser welding or resistance welding, there is internal stress, the method only releases the internal stress of laser welding to determine that the product is qualified, and there is a condition of missing determination, and the whole process is not temperature controlled, the power test deviation is about 3% to cause inaccurate determination, and the product with actual variation of 4% is probably compared with 7% because of the test deviation, if the variation of 5% is qualified, the product is determined to be unqualified, and the variation of the actual product is only 4%, and is a qualified product, which causes inaccurate determination.
The temperature control process of the whole procedure internal stress release judgment and the coupling and power test is added, so that the bad flow out of the production line can be completely avoided.
Disclosure of Invention
In order to solve the technical problems provided by the background art, the invention provides a method for releasing stress of a BOX TOSA product in the whole process, which is used for judging the internal stress release of the whole process, releasing coupling laser welding stress and parallel sealing welding stress through 2 times of stress release, and ensuring the stability of the optical power of an optical device, thereby ensuring the stable performance of the optical device, preventing bad products from flowing into the market, preventing the optical power from being reduced due to incomplete stress release after a period of time of use of a customer, preventing the customer from goods return complaint due to the reason, prolonging the service life of the product at the customer end, and improving the public praise in the industry.
In order to achieve the purpose, the invention adopts the following technical scheme:
a stress release method for a BOX TOSA product whole process is used for releasing and judging the internal stress of the BOX TOSA product whole process, and comprises a plurality of stress release processes, and specifically comprises the following steps:
1) carrying out temperature-controlled laser coupling welding at the temperature of W1; carrying out temperature control and testing optical power after the coupled laser welding, wherein the temperature control temperature is W2; picking out the optical devices which are seriously stressed and fall light beyond the change range of the set value X for repairing;
2) performing high-low temperature circulation on qualified products for n1 circulations and high-temperature storage for m1 hours to release stress, then performing temperature control optical power test and comparing with the last optical power, wherein the temperature control temperature is W3, and performing repair recoupling on products with optical power change exceeding a set value Y;
3) performing parallel seam welding on qualified products, performing high-low temperature circulation for n2 circulation after sealing welding and high-temperature storage for m2 hours for stress release, and then performing temperature control optical power test to compare with the last optical power, wherein the temperature control temperature is W4; products with optical power variation exceeding a set value Z are repaired and recoupled; thereby screening out the good products and the defective products.
Further, the temperature control temperature W1 is 20-40 ℃.
Further, the temperature control temperature W2 is 20-40 ℃.
Further, the temperature control temperature W3 is 20-40 ℃.
Further, the temperature control temperature W4 is 20-40 ℃.
Further, the set value X is 5-15%.
Further, the set value Y is 0.5-1.5 dB.
Further, the set value Z is 0.5-1.5 dB.
Furthermore, the n1 cycles are 10-20 cycles, and the m1 hours are 24-25 hours.
Furthermore, the n2 cycles are 10-20 cycles, and the m2 hours are 24-25 hours.
Further, the stress release method specifically comprises the following steps:
step 1: carrying out temperature control coupling laser welding with the temperature control W1 on the TOSA to be coupled, and recording the power after welding as P1;
step 2: carrying out temperature control power test with the temperature control temperature of W2 on the welded TOSA, comparing the recorded power P2, P2 and P1, carrying out repair recoupling on the product beyond the range of the set value X, and starting from the first step;
and step 3: putting the qualified product into a high-low temperature circulating box for n1 circulations, taking out the product and then putting the product into a high-temperature storage for m1 hours;
and 4, step 4: taking out the product after the high-low temperature circulation and the high-temperature storage are finished, carrying out power test with the temperature control temperature of W3, recording the power P3, comparing the power P3 with the power P2, carrying out repair recoupling on the product beyond the range of the set value Y, and starting from the first step;
and 5: performing parallel seam welding on the qualified product;
step 6: putting the seam-welded product into a high-low temperature circulating box for n2 circulations, taking out and putting into a high-temperature storage for m2 hours;
and 7: taking out the product after the high-low temperature circulation and high-temperature storage are completed, carrying out power test with the temperature control temperature of W4, recording the power P4, comparing the power P4 with the power P3, carrying out repair recoupling on the product exceeding the range of the set value Z, and finishing the step IV from the beginning; the other qualified products are stress release qualified products.
Compared with the prior art, the invention has the beneficial effects that:
1) the method carries out internal stress release judgment of the whole process, releases coupling laser welding stress and parallel sealing welding stress through stress release for 2 times, and ensures the stability of the optical power of the optical device, thereby ensuring the stable performance of the optical device, avoiding the defective products from flowing into the market, and avoiding the optical power reduction caused by incomplete stress release after a period of use by customers. No matter laser welding or resistance welding, internal stress exists, in the stress release method in the prior art, the product is judged to be qualified only by laser welding internal stress release, and the condition of judgment omission exists.
2) The method can effectively screen out the defective products caused by overlarge internal stress after the coupling welding and the parallel sealing welding, and avoids the power attenuation caused by the deviation of the light path due to the internal stress, thereby ensuring the stability and the reliability of the optical power of the optical device, having simple process and being suitable for various TOSA optical devices packaged by BOX. The method can more accurately and more strictly judge whether the internal stress of the optical device is completely released, avoids omission caused by single judgment, ensures the optical power of the optical device, improves the stability of products, reduces defective products, reduces the failure rate of client products, and better ensures the reliability of the products.
3) The invention adopts temperature control coupling, because the optical power of the optical device is greatly influenced by temperature, if the optical power at the same temperature cannot be ensured to be compared, deviation is easy to occur, so that good products and defective products cannot be screened accurately, the optical power is tested by temperature control, the comparison is more accurate, the stress release method in the prior art is not subjected to temperature control, the power test deviation is about 3 percent, so that the judgment is inaccurate, the invention can completely avoid the error, can avoid the phenomenon, avoid the defective products from mixing into the good products, ensure the reliability of the products, avoid the good products from mixing into the defective products, cause unwarranged repair, save the cost and ensure the yield.
Drawings
FIG. 1 is a flow chart of a BOX TOSA product full process stress relief method of the present invention.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings.
The production process of the optical device comprises the following steps: (1) the method comprises the steps of mounting components (2), bonding gold wires (3), testing the initial stage of the mounting components (4), coupling and welding optical devices (5), and parallel seam welding optical devices (6) for delivery testing. The method can effectively screen out products with optical path deviation caused by internal stress and incomplete internal stress release in the coupling welding and parallel seam welding processes, and avoid the situation that the optical path deviation cannot be found due to the internal stress of the optical device.
The invention discloses a BOX TOSA product whole-process stress release method, which comprises the following steps:
1) carrying out temperature-controlled laser coupling welding, carrying out temperature-controlled optical power testing after the coupling laser welding, and picking out the optical devices which are seriously stressed and have light falling out of a 10% change range for repairing;
2) and performing high-low temperature circulation for 10-20 cycles and high-temperature storage for 24 hours on the qualified product for stress release, then performing temperature control optical power test and comparing the optical power with the last optical power, and performing repair recoupling on the product with the optical power change exceeding 1 dB.
3) And performing parallel seam welding on the qualified product, performing high-low temperature circulation for 10-20 circulation after sealing welding and high-temperature storage for 24h for stress release, performing temperature control optical power test, comparing with the last optical power, and performing repair recoupling on the product with the optical power change exceeding 1 dB. Thereby screening out the good products and the defective products.
As shown in fig. 1, the method for releasing stress of BOX TOSA product in the whole process includes the following steps:
step 1: carrying out coupling laser welding at the temperature of 30 ℃ by using a TOSA to be coupled, and recording the power after welding as P1;
step 2: performing a temperature-controlled 30 ℃ power test on the welded TOSA, comparing the recorded power P2, P2 and P1, (P2-P1)/P2x 100%, and performing repair recoupling on products exceeding the 10% range from the beginning of the step;
and step 3: putting the qualified product into a high-low temperature circulating box for 10 cycles, taking out the product and putting the product into a high-temperature storage 24H;
and 4, step 4: taking out the product after the high-low temperature circulation and high-temperature storage are finished, carrying out a power test at the temperature of 30 ℃, recording power P3, comparing P3 with P2, enabling P3-P2 to be less than or equal to +/-1 dB, carrying out repair recoupling on the product beyond the range of 1dB, and beginning with the step one;
and 5: performing parallel seam welding on the qualified product;
step 6: putting the seam-welded product into a high-low temperature circulating box for 10 cycles, taking out and putting into a high-temperature storage 24H;
and 7: and taking out the product after the high-low temperature circulation and high-temperature storage are finished, carrying out a power test at the temperature of 30 ℃, recording power P4, comparing P4 with P3, wherein P4-P3 are not more than 1dB, carrying out repair recoupling on the product beyond the range of 1dB, and finishing the steps from the first step to the fourth step. The other qualified products are stress release qualified products.
Note:
1 circulation, namely, the normal temperature is 25 ℃, the linear temperature is 10 ℃ and the temperature is reduced to-40 ℃, the temperature is maintained for 15 minutes at the temperature of-40 ℃, the linear temperature is 10 ℃ and the temperature is increased to +85 ℃, the temperature is maintained for 15 minutes at +85 ℃, the linear temperature is 10 ℃ and the temperature is reduced to the normal temperature of 25 ℃ (the temperatures are set values, and the actual set values are +/-5 ℃)
High temperature storage 24H 85 ℃ (set point) ± 5 ℃ storage 24H
The data for the examples of the invention are as follows:
TABLE 1
The method carries out internal stress release judgment of the whole process, releases coupling laser welding stress and parallel sealing welding stress through stress release for 2 times, and ensures the stability of the optical power of the optical device, thereby ensuring the stable performance of the optical device, avoiding the defective products from flowing into the market, and avoiding the optical power reduction caused by incomplete stress release after a period of use by customers. No matter laser welding or resistance welding, internal stress exists, in the stress release method in the prior art, the product is judged to be qualified only by laser welding internal stress release, and the condition of judgment omission exists.
The invention can effectively screen out the defective products caused by overlarge internal stress after coupling welding and parallel sealing welding, and avoids the power attenuation caused by the light path deviation caused by the internal stress, thereby ensuring the stability and reliability of the optical power of the optical device, having simple process and being suitable for various BOX packaged TOSA optical devices. The method can more accurately and more strictly judge whether the internal stress of the optical device is completely released, avoids omission caused by single judgment, ensures the optical power of the optical device, improves the stability of products, reduces defective products, reduces the failure rate of client products, and better ensures the reliability of the products.
The invention adopts temperature control coupling, because the optical power of the optical device is greatly influenced by temperature, if the optical power at the same temperature cannot be ensured to be compared, deviation is easy to occur, so that good products and defective products cannot be screened accurately, the optical power is tested by temperature control, the comparison is more accurate, the stress release method in the prior art is not subjected to temperature control, the power test deviation is about 3 percent, so that the judgment is inaccurate, the invention can completely avoid the error, can avoid the phenomenon, avoid the defective products from mixing into the good products, ensure the reliability of the products, avoid the good products from mixing into the defective products, cause unwarranged repair, save the cost and ensure the yield.
In conclusion, the invention can more accurately and more strictly judge whether the stress release of the optical device is qualified, and the temperature control test avoids wrong judgment caused by test deviation to cause poor and good devices to be mixed together, thereby reducing good device repair errors, reducing wrong delivery of the poor devices, improving the yield of the client, reducing customer complaints and improving the public praise in the industry.
The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (10)
1. A stress release method for a BOX TOSA product in a whole process is characterized in that the stress release method carries out internal stress release and judgment on the BOX TOSA product in the whole process, wherein the stress release method comprises a plurality of stress release processes, and specifically comprises the following steps:
1) carrying out temperature-controlled laser coupling welding at the temperature of W1; carrying out temperature control and testing optical power after the coupled laser welding, wherein the temperature control temperature is W2; picking out the optical devices which are seriously stressed and fall light beyond the change range of the set value X for repairing;
2) performing n1 cycles and high-temperature storage for m1 hours on qualified products for stress release, then performing temperature control optical power test and comparing with the last optical power, wherein the temperature control temperature is W3, and performing repair recoupling on products with optical power change exceeding a set value Y;
3) performing parallel seam welding on qualified products, performing high-low temperature circulation of n2 cycles and high-temperature storage for m2 hours after sealing welding for stress release, and then performing temperature control optical power test to compare with the last optical power, wherein the temperature control temperature is W4; products with optical power variation exceeding a set value Z are repaired and recoupled; thereby screening out the good products and the defective products.
2. The BOX TOSA product full process stress relief method as recited in claim 1, wherein said temperature controlled W1 is 20-40 ℃.
3. The BOX TOSA product full process stress relief method as recited in claim 1, wherein said temperature controlled W2 is 20-40 ℃.
4. The BOX TOSA product full process stress relief method as recited in claim 1, wherein said temperature controlled W3 is 20-40 ℃.
5. The BOX TOSA product full process stress relief method as recited in claim 1, wherein said temperature controlled W4 is 20-40 ℃.
6. The BOX TOSA product full process stress relief method as recited in claim 1, wherein said set value X is 5-15%.
7. The BOX TOSA product full process stress relief method as recited in claim 1, wherein the set value Y is 0.5-1.5 dB.
8. The BOX TOSA product full process stress relief method as recited in claim 1, wherein the set value Z is 0.5-1.5 dB.
9. The BOX TOSA product full process stress relief method of claim 1, wherein the n1 cycles is 10-20 cycles, and m1 hours is 24-25 hours; the n2 cycles are 10-20 cycles, and the m2 hours are 24-25 hours.
10. The BOX TOSA product full process stress relief method according to claim 1, wherein the stress relief method specifically includes the steps of:
step 1: carrying out temperature control coupling laser welding with the temperature control W1 on the TOSA to be coupled, and recording the power after welding as P1;
step 2: carrying out temperature control power test with the temperature control temperature of W2 on the welded TOSA, comparing the recorded power P2, P2 and P1, carrying out repair recoupling on the product beyond the range of the set value X, and starting from the first step;
and step 3: putting the qualified product into a high-low temperature circulating box for n1 circulations, taking out the product and then putting the product into a high-temperature storage for m1 hours;
and 4, step 4: taking out the product after the high-low temperature circulation and the high-temperature storage are finished, carrying out power test with the temperature control temperature of W3, recording the power P3, comparing the power P3 with the power P2, carrying out repair recoupling on the product beyond the range of the set value Y, and starting from the first step;
and 5: performing parallel seam welding on the qualified product;
step 6: putting the seam-welded product into a high-low temperature circulating box for n2 circulations, taking out and putting into a high-temperature storage for m2 hours;
and 7: taking out the product after the high-low temperature circulation and high-temperature storage are completed, carrying out power test with the temperature control temperature of W4, recording the power P4, comparing the power P4 with the power P3, carrying out repair recoupling on the product exceeding the range of the set value Z, and finishing the step IV from the beginning; the other qualified products are stress release qualified products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111645127.5A CN114247994A (en) | 2021-12-29 | 2021-12-29 | Box TOSA product whole-process stress release method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111645127.5A CN114247994A (en) | 2021-12-29 | 2021-12-29 | Box TOSA product whole-process stress release method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114247994A true CN114247994A (en) | 2022-03-29 |
Family
ID=80798767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111645127.5A Pending CN114247994A (en) | 2021-12-29 | 2021-12-29 | Box TOSA product whole-process stress release method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114247994A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005044829A (en) * | 2003-07-22 | 2005-02-17 | Furukawa Electric Co Ltd:The | Laser diode module |
| US20120082176A1 (en) * | 2010-09-30 | 2012-04-05 | Arima Lasers Corp. | Conduction cooled package laser and packaging method for forming the same |
| CN104846184A (en) * | 2015-05-22 | 2015-08-19 | 大连藏龙光电子科技有限公司 | Laser welding inner stress releasing method of TOSA (transmitter optical subassembly) |
| CN109254364A (en) * | 2018-11-14 | 2019-01-22 | 四川光恒通信技术有限公司 | A kind of unidirectional optical device of novel fully-sealed single fiber and its packaging method |
| CN110205472A (en) * | 2019-06-10 | 2019-09-06 | 大连藏龙光电子科技有限公司 | A kind of optical module stress release method |
| CN113451875A (en) * | 2021-06-22 | 2021-09-28 | 青岛海信激光显示股份有限公司 | Laser device |
| CN215299245U (en) * | 2021-06-11 | 2021-12-24 | 利晶微电子技术(江苏)有限公司 | Package device and electronic apparatus |
-
2021
- 2021-12-29 CN CN202111645127.5A patent/CN114247994A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005044829A (en) * | 2003-07-22 | 2005-02-17 | Furukawa Electric Co Ltd:The | Laser diode module |
| US20120082176A1 (en) * | 2010-09-30 | 2012-04-05 | Arima Lasers Corp. | Conduction cooled package laser and packaging method for forming the same |
| CN104846184A (en) * | 2015-05-22 | 2015-08-19 | 大连藏龙光电子科技有限公司 | Laser welding inner stress releasing method of TOSA (transmitter optical subassembly) |
| CN109254364A (en) * | 2018-11-14 | 2019-01-22 | 四川光恒通信技术有限公司 | A kind of unidirectional optical device of novel fully-sealed single fiber and its packaging method |
| CN110205472A (en) * | 2019-06-10 | 2019-09-06 | 大连藏龙光电子科技有限公司 | A kind of optical module stress release method |
| CN215299245U (en) * | 2021-06-11 | 2021-12-24 | 利晶微电子技术(江苏)有限公司 | Package device and electronic apparatus |
| CN113451875A (en) * | 2021-06-22 | 2021-09-28 | 青岛海信激光显示股份有限公司 | Laser device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107632275A (en) | A kind of LED illumination life of product and method for quickly evaluating reliability | |
| WO2022012147A1 (en) | Packaged chip test method and system, computer device, and storage medium | |
| CN114247994A (en) | Box TOSA product whole-process stress release method | |
| CN110611533B (en) | Method for filtering defective optical modules of ONU (optical network Unit) in production line | |
| CN100573170C (en) | The testing apparatus of automatized measurement for luminous diode and method | |
| CN106503908B (en) | Method for evaluating operation quality of power transformation equipment | |
| CN102520329A (en) | Reliability test method of semiconductor laser | |
| CN108089072A (en) | A kind of aging clamp at individual laser package initial stage and its application | |
| CN114421888A (en) | Damp-heat aging test method for photovoltaic module | |
| Sakamoto et al. | Field test results on the stability of crystalline silicon photovoltaic modules manufactured in the 1990s | |
| CN106646005B (en) | Converter valve optical coupler module launching circuit reliability test platform and test method | |
| CN102013624A (en) | Automatic debugging method for optical eye diagram of optical module | |
| CN115189219A (en) | Method for obtaining optimal aging condition of edge-emitting laser chip and method for screening chip by adopting condition | |
| JP5205530B1 (en) | Solar cell array inspection system | |
| CN115453318A (en) | Method for identifying weak links in storage and use of integrated circuit and improving process | |
| CN108152754A (en) | A kind of method for evaluating power battery welding effect quality and the error correction remedial systems based on this method | |
| CN104122506B (en) | A kind of LED drives power supply test method | |
| CN208937756U (en) | A kind of unidirectional optical device of novel fully-sealed single fiber | |
| CN117074836B (en) | Laser detection method, detector, electronic equipment and storage medium | |
| CN113075525B (en) | Voltage correction method for LED light splitting station | |
| Gabor et al. | Detection and impact of cracks hidden near interconnect wires in silicon solar cells | |
| Wohlgemuth | Assessing the trends in module field failures | |
| CN221381668U (en) | DFN encapsulation reverse side manual welding structure | |
| CN200996981Y (en) | Terminal-module tester | |
| CN105842634A (en) | Method for detecting luminance attenuation of LED lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220329 |