CN208596662U - A kind of wafer paster apparatus of optical splitter - Google Patents

A kind of wafer paster apparatus of optical splitter Download PDF

Info

Publication number
CN208596662U
CN208596662U CN201821003257.2U CN201821003257U CN208596662U CN 208596662 U CN208596662 U CN 208596662U CN 201821003257 U CN201821003257 U CN 201821003257U CN 208596662 U CN208596662 U CN 208596662U
Authority
CN
China
Prior art keywords
patch
rack
wafer
plate
locating piece
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.)
Expired - Fee Related
Application number
CN201821003257.2U
Other languages
Chinese (zh)
Inventor
孙振忠
李川
陈海彬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongguan University of Technology
Original Assignee
Dongguan University of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dongguan University of Technology filed Critical Dongguan University of Technology
Priority to CN201821003257.2U priority Critical patent/CN208596662U/en
Application granted granted Critical
Publication of CN208596662U publication Critical patent/CN208596662U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Coating Apparatus (AREA)

Abstract

The utility model discloses a kind of wafer paster apparatus of optical splitter, it includes rack, the patch workbench being arranged on the rack, through-hole is offered on patch workbench, the side of rack is fixed with cylinder, the piston rod of cylinder connects slide, and the two sides of slide are equipped with rolling bearing units and servo motor, and screw axis is mounted on rolling bearing units and servo motor, screw axis is threadedly coupled with slide plate, and slide plate is connect with plaster mechanism;It is fixed with tooth plate under slide, is provided with movable rotation-shaft in rack, movable rotation-shaft is provided with gear, is equipped with axle sleeve on the diameter of axle, and gear engages connection with tooth plate, glue brush is provided on axle sleeve;Lower end positioned at axle sleeve is provided with gumming mechanism, the purpose of this utility model is in view of the above problems, a kind of wafer paster apparatus of optical splitter is provided, while declining plaster mechanism using cylinder, complete the brush coating task to glass cover-plate, semi-automatic patch task is completed, the patch efficiency and quality of wafer are improved.

Description

A kind of wafer paster apparatus of optical splitter
Technical field
The invention belongs to communication products fields, in particular to being bonded to wafer and glass cover-plate, specially a kind of light The wafer paster apparatus of splitter.
Background technique
Being thinned for wafer is frequently involved in semiconductor processes, especially in the preparation process of semiconductor laser chip In, in order to reach good heat dissipation effect and adapt to laser chip light and smallization development trend, the wafer by 400 microns is needed to subtract 100 microns are as thin as, however the thinned of wafer thickness leads to the reduction of its mechanical strength, causes to be easy to produce in thinning process Raw fragment, production yield greatly reduce.Therefore it before carrying out reduction process, needs to exist the front of wafer by adhesive bond Have on certain thickness glass or ceramic substrate, to facilitate the operation of reduction process, increase wafer mechanical strength, is split to reduce Piece promotes yield.
Wafer crosses Cheng Qian in patch, needs to smear glass cover-plate or wafer in UV glue, existing paster apparatus is all to use The mode manually smeared carries out, and due to smearing using artificial, if the UV glue smeared is excessive, wafer fitting can be made to cool down waiting Time is longer, if the UV glue smeared is very few, fitting dynamics is inadequate, is easy to fall off, and after smearing UV glue, when carrying out patch, shows There is device, placing wafer and when glass cover-plate, not can guarantee the precision of institute's placement location, error, cannot achieve High accuracy positioning patch, good time difference when leading to patch quality, levels of audit quality is uneven, therefore, needs a kind of paster apparatus, to meet To the quick patch of wafer.
Summary of the invention
The purpose of the present invention is made using cylinder in view of the above problems, provide a kind of wafer paster apparatus of optical splitter While plaster mechanism declines, complete that the brush coating task of glass cover-plate is completed semi-automatic patch task, improves wafer Patch efficiency and quality.
In order to achieve the above object, the technical solution adopted by the present invention is that: a kind of wafer paster apparatus of optical splitter, it is wrapped Including rack, the patch workbench being arranged on the rack offer on the patch workbench and place wafer and glass cover-plate Two through-holes, the side of the rack are fixed with cylinder, and the piston rod of the cylinder connects slide, and the two sides of the slide are equipped with Rolling bearing units and servo motor, screw axis are mounted on rolling bearing units and servo motor, and the screw axis is threadedly coupled with slide plate, The opening that the slide plate passes through slide is connect with plaster mechanism, and the plaster mechanism is located at the upper end of through-hole;In the slide Lower plate on be fixed with tooth plate, be provided with movable rotation-shaft in rack, the two sides of the movable rotation-shaft are provided with gear, on the diameter of axle Axle sleeve is installed, the gear engages connection with tooth plate, and glue brush is provided on axle sleeve, and the glue brush is located at glass cover-plate institute In the through-hole of placement;Lower end positioned at axle sleeve is provided with gumming mechanism.
Further, the gumming mechanism is by glue loading box and support bar group at being placed with UV glue in the glue loading box.
Further, the plaster mechanism includes a manifold clamp, connecting rod and patch rack, the branch manifold clamp It is connect with connecting rod with slide plate, paster table frame is arranged in connecting rod;Positioned at the lower end of patch rack, sucker fixed block, institute are set The lower end for stating sucker fixed block is provided with sucker, and gas-tpe fitting is connect by tracheae with sucker.
Further, inner cavity and the gas outlet for being connected to inner cavity are offered in the patch rack, the gas outlet is located at Patch rack two sides, branch pipe one end are fixed on branch manifold clamp, and the other end is connected to the inner cavity of patch rack.
Further, the identical left locating piece of shape is respectively arranged with for placing the through hole of glass cover-plate and wafer I and left locating piece II, the through hole for placing wafer are provided with the right locating piece II being oppositely arranged with left locating piece II, institute The left locating piece I stated and left locating piece II pass through spring and connect patch workbench, and left-hand end is provided with the conical surface, the conical surface with It is formed with card slot between patch workbench, is provided with the briquetting matched with the conical surface on the left of the patch rack.
Further, the shape of the left locating piece I and left locating piece II is to form parallel first of extending direction Point and Part III, and the second part of connection first part and Part III, the second part and first part and third Part is vertically arranged.
Further, in wafer patch, the patch rack and left locating piece II, wafer, glass cover-plate and patch A drying tank is formed between piece workbench, the drying tank is connected to inner cavity by gas outlet.
The invention has the benefit that
Engagement 1. the present invention carries out moving down clamping glass cover-plate using cylinder to slide, by tooth plate to gear Thrust rotates movable rotation-shaft, realizes and carries out brush coating to glass cover-plate, reduces the use of motor, cleverly design, and makes entire Device is more reasonable, by semi-automatic patch, substantially increases the quality of the patch efficiency of wafer.
2. the device uses automatic brush coating, make to be applied to the UV glue amount homogeneous on glass cover-plate, the wafer after patch is high Degree is consistent.
3. the patch rack with inner cavity, by being filled with hot wind, is accelerated to the solidification after wafer bak stay after patch Speed.
4. in decline, using the extruding of briquetting, make left locating piece I and left locating piece II to glass cover-plate and wafer into Row centralized positioning guarantees that welt flushes in patch, and the quality being bonded is highly improved, and the stability of wafer obtains Enhancing.
5. in wafer patch, between patch rack and left locating piece II, wafer, glass cover-plate and patch workbench A drying tank is formed, the hot gas being filled in drying tank, the hot gas being filled with is dried in drying tank around welt side seam, Reduce distributing for hot gas.
6. wafer of the present invention is kept entire patch efficiency quicker, is reduced the labor of worker using semi-automatic patch Fatigue resistance improves work efficiency.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the partial enlargement structural representation in Fig. 1 at A.
Fig. 3 is the structural schematic diagram that brush coating is carried out to glass cover-plate.
Fig. 4 is the structural schematic diagram that glue brush is provided on movable rotation-shaft.
Fig. 5 is the structural schematic diagram that plaster mechanism draws that glass cover-plate prepares patch.
Fig. 6 is the connection schematic perspective view of sucker fixed block and sucker.
Fig. 7 is the partial enlargement structural representation in Fig. 5 at B.
Fig. 8 is the structural schematic diagram of left locating piece I.
Label character described in figure indicates are as follows: 1, rack;2, cylinder;3, piston rod;4, slide;5, rolling bearing units;6, it watches Take motor;7, screw axis;8, slide plate;9, plaster mechanism;10, tooth plate;11, gear;12, movable rotation-shaft;13, axle sleeve;14, glue Brush;15, gumming mechanism;16, patch workbench;17, glass cover-plate;18, wafer;19, left locating piece I;20, sliding slot;21, bullet Spring;22, right locating piece II;23, left locating piece II;24, UV glue;151, glue loading box;152, support rod;161, through-hole;191, it supports By face;192, first part;193, second part;194, Part III;231, the conical surface;401, it is open;901, branch manifold clamp; 902, connecting rod;903, gas-tpe fitting;904, sucker fixed block;905, sucker;906, branch pipe;907, patch rack;908, interior Chamber;909, briquetting;910, gas outlet;911, drying tank;912, gap.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, with reference to the accompanying drawing to the present invention into Row detailed description, the description of this part be only it is exemplary and explanatory, should not have any limitation to protection scope of the present invention Effect.
As Figure 1-Figure 8, specific structure of the invention are as follows: it includes rack 1, the patch being arranged in rack 1 work Platform 16 offers two through-holes 161 for placing wafer 18 and glass cover-plate 17, the rack 1 on the patch workbench 16 Side be fixed with cylinder 2, the piston rod 3 of the cylinder 2 connects slide 4, and the two sides of the slide 4 are equipped with 5 He of rolling bearing units Servo motor 6, screw axis 7 are mounted on rolling bearing units 5 and servo motor 6, and the screw axis 7 is threadedly coupled with slide plate 8, are passed through The step of servo motor 6 drives slide plate 8 to be displaced on screw axis 7, realizes intermediate plate and patch, the slide plate 8 passes through opening for slide 4 Mouth 401 is connect with plaster mechanism 9, and the plaster mechanism 9 is located at the upper end of through-hole 161;It is solid on the lower plate of the slide 4 Surely there is tooth plate 10, be provided with movable rotation-shaft 12 in rack 1, the two sides of the movable rotation-shaft 12 are provided with gear 11, pacify on the diameter of axle Equipped with axle sleeve 13, the gear 11 engages connection with tooth plate 10, pushes gear 11 to rotate by tooth plate 10, is arranged on axle sleeve 13 There is glue brush 14, the gear 11 of rotation drives movable rotation-shaft 12 to rotate, makes glue brush 14 that 24 glue of UV glue is applied to glass cover-plate 17 On, the glue brush 14 is located in the through-hole 161 that glass cover-plate 17 is placed, and brushes convenient for the bottom to glass cover-plate 17 Glue;The lower end of axle sleeve 13 is provided with gumming mechanism 15;Using automatic brush coating, the UV glue amount for making to be applied on glass cover-plate is equal Matter, 18 height of wafer after patch are consistent.
Preferably, the gumming mechanism 15 is made of glue loading box 151 and support rod 152, is placed in the glue loading box 151 UV glue while autosizing, contains the glue of drippage, ensure that the benefit of 24 glue of cleannes and UV glue of device With rate.
Preferably, the plaster mechanism 9 includes a manifold clamp 901, connecting rod 902 and patch rack 907, described Branch manifold clamp 901 and connecting rod 902 are connect with slide plate 8, and patch rack 907 is arranged in connecting rod 902;Positioned at patch rack Sucker fixed block 904 is arranged in 907 lower end, and the lower end of the sucker fixed block 904 is provided with sucker 905, and gas-tpe fitting 903 is logical Tracheae is crossed to connect with sucker 905.
Preferably, inner cavity 908 and the gas outlet 910 for being connected to inner cavity 908 are offered in the patch rack 907, it is described Gas outlet 910 is located at 907 two sides of patch rack, and 906 one end of branch pipe is fixed on branch manifold clamp 901, the other end and patch rack 907 inner cavity 908 is connected to, and the patch rack 907 with inner cavity 908, by being filled with hot wind, is accelerated to wafer after patch Setting rate after 18 patch of piece.
Preferably, the identical left side of shape is respectively arranged at glass cover-plate 17 and the through-hole 161 of wafer 18 for placing Locating piece I19 and left locating piece II23 is provided with set opposite with left locating piece II23 at the through-hole 161 for placing wafer 18 The right locating piece II22, the left locating piece I19 and left locating piece II23 set passes through spring 21 and connects patch workbench 16, And left-hand end is provided with the conical surface 231, and card slot 20, the patch rack 907 are formed between the conical surface 231 and patch workbench 16 Left side be provided with the briquetting 909 matched with the conical surface 231, briquetting 909 pushes left locating piece I19 or left locating piece II23 to glass Glass cover board 17 and wafer carry out intermediate plate positioning and patch positioning, guarantee that welt flushes in patch, the quality being bonded obtains The stability of biggish promotion, wafer is enhanced.
Preferably, the shape of the left locating piece I19 and left locating piece II23 be to be formed extending direction it is parallel first Part 192 and Part III 194, and the second part 193 of connection first part 192 and Part III 194, the second part 193 are vertically arranged with first part 192 and Part III 194.
Preferably, in wafer patch, the patch rack 907 and left locating piece II23, wafer 18, glass cover-plate 17 And a drying tank 911 is formed between patch workbench 16, the drying tank 911 is connected to inner cavity 908 by gas outlet 910, The hot gas being filled in drying tank, the hot gas being filled with are dried in drying tank around welt side seam, and hot gas is reduced It distributes, improves the reasonable utilization of heat.
The course of work of the invention:
Manually or mechanically glass cover-plate 17 and wafer 18 are placed on patch workbench 16 by hand, such as Fig. 2, glass cover-plate 17 are placed on left locating piece I19;Such as Fig. 7, wafer 18 is placed in left locating piece 23.Then such as Fig. 1, starts cylinder 2, make piston Bar 3 bounces back, and slide 4 moves down, and while slide 4 moves down, the rack gear 10 being arranged on slide 4 drives gear 11 to rotate, and drives Movable rotation-shaft 12 rotates, and the glue brush 14 of rotation carries out brush coating to 17 bottom surface of glass cover-plate, and (height of glue brush 14 works beyond patch The upper plane of platform 16), for the briquetting 909 positioned at patch rack 907 in decline, briquetting 909 pushes left locating piece I19 to move to right, and supports It pushes glass cover-plate 17 mobile by face 191, the gap 912 between glass cover-plate 17 and abutment face 191 is made to be converted into fit-state, Sucker 905 draws glass cover-plate 17 at this time, is clamped to glass cover-plate 17.
Then, starting cylinder 2, slide 4 is pushed to rise to certain position, servo motor 6 starts, and drive screw axis 7 to rotate, Since to be threadedly coupled, slide plate 8 is moved to right, after reaching the positive upper end of wafer 18, cylinder 2 starts, and slide 4 is made to be displaced downwardly to fixation Position, as shown in figs. 4 and 7, briquetting 909 push left locating piece II23 mobile, carry out centralized positioning to wafer 18, guarantee patch Piece flushes, and after patch flushes, patch rack 907 and left locating piece II23, wafer 18, glass cover-plate 17 and patch work Drying tank 911 is formed between platform 16, is filled with hot wind into drying tank 911, and fitting side seam is dried, it is solidifying after accelerating welt Gu speed.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic Element.
Used herein a specific example illustrates the principle and implementation of the invention, the explanation of above example Method and its core concept of the invention are merely used to help understand, the above is only a preferred embodiment of the present invention, are answered When pointing out due to the finiteness of literal expression, and objectively there is unlimited specific structure, for the common skill of the art For art personnel, without departing from the principle of the present invention, several improvement, retouching or variation can also be made, can also incited somebody to action Above-mentioned technical characteristic is combined in the right way;These improve retouching, variation or combination, or the not improved structure by invention Think and technical solution directly applies to other occasions, is regarded as protection scope of the present invention.

Claims (7)

1. a kind of wafer paster apparatus of optical splitter, which is characterized in that it includes the patch of rack (1), setting on rack (1) Piece workbench (16) offers two through-holes for placing wafer (18) and glass cover-plate (17) on the patch workbench (16) (161), the side of the rack (1) is fixed with cylinder (2), and the piston rod (3) of the cylinder (2) connects slide (4), the cunning The two sides of seat (4) are equipped with rolling bearing units (5) and servo motor (6), and screw axis (7) is mounted on rolling bearing units (5) and servo motor (6) on, the screw axis (7) is threadedly coupled with slide plate (8), and the slide plate (8) passes through the opening (401) and patch of slide (4) Mechanism (9) connection, the plaster mechanism (9) are located at the upper end of through-hole (161);It is fixed on the lower plate of the slide (4) Have tooth plate (10), be provided in rack (1) movable rotation-shaft (12), the two sides of the movable rotation-shaft (12) be provided with gear (11), It is equipped on the diameter of axle axle sleeve (13), the gear (11) engages connection with tooth plate (10), and axle sleeve is provided with glue brush on (13) (14), the glue brush (14) is located in the through-hole (161) that glass cover-plate (17) is placed;It is arranged positioned at the lower end of axle sleeve (13) There are gumming mechanism (15).
2. a kind of wafer paster apparatus of optical splitter according to claim 1, which is characterized in that the gumming mechanism (15) it is made of glue loading box (151) and support rod (152), is placed with UV glue in the glue loading box (151).
3. a kind of wafer paster apparatus of optical splitter according to claim 1, which is characterized in that the plaster mechanism (9) include a manifold clamp (901), connecting rod (902) and patch rack (907), the branch manifold clamp (901) and connection Bar (902) is connect with slide plate (8), and patch rack (907) is arranged on connecting rod (902);Positioned at the lower end of patch rack (907) It is arranged sucker fixed block (904), the lower end of the sucker fixed block (904) is provided with sucker (905), and gas-tpe fitting (903) is logical Tracheae is crossed to connect with sucker (905).
4. a kind of wafer paster apparatus of optical splitter according to claim 3, which is characterized in that the patch rack (907) inner cavity (908) and the gas outlet (910) for being connected to inner cavity (908) are offered in, the gas outlet (910) are located at patch Rack (907) two sides, branch pipe (906) one end are fixed on branch manifold clamp (901), the inner cavity of the other end and patch rack (907) (908) it is connected to.
5. a kind of wafer paster apparatus of optical splitter according to claim 4, which is characterized in that for placing glass cover The identical left locating piece I(19 of shape is respectively arranged at the through-hole (161) of plate (17) and wafer (18)) and left locating piece II (23), the right locating piece being oppositely arranged with left locating piece II(23) is provided at the through-hole (161) for placing wafer (18) II(22), the left locating piece I(19) and left locating piece II(23) by spring (21) connection patch workbench (16), and Left-hand end is provided with the conical surface (231), and card slot (20), the patch are formed between the conical surface (231) and patch workbench (16) The briquetting (909) matched with the conical surface (231) is provided on the left of rack (907).
6. a kind of wafer paster apparatus of optical splitter according to claim 5, which is characterized in that the left locating piece I (19) and left locating piece II(23) shape be to form the parallel first part of extending direction (192) and Part III (194), And the second part (193) of connection first part (192) and Part III (194), the second part (193) and first part (192) it is vertically arranged with Part III (194).
7. a kind of wafer paster apparatus of optical splitter according to claim 5, which is characterized in that in wafer patch, The patch rack (907) and left locating piece II(23), wafer (18), glass cover-plate (17) and patch workbench (16) it Between formed a drying tank (911), the drying tank (911) and inner cavity (908) are connected to by gas outlet (910).
CN201821003257.2U 2018-06-28 2018-06-28 A kind of wafer paster apparatus of optical splitter Expired - Fee Related CN208596662U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821003257.2U CN208596662U (en) 2018-06-28 2018-06-28 A kind of wafer paster apparatus of optical splitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821003257.2U CN208596662U (en) 2018-06-28 2018-06-28 A kind of wafer paster apparatus of optical splitter

Publications (1)

Publication Number Publication Date
CN208596662U true CN208596662U (en) 2019-03-12

Family

ID=65602014

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821003257.2U Expired - Fee Related CN208596662U (en) 2018-06-28 2018-06-28 A kind of wafer paster apparatus of optical splitter

Country Status (1)

Country Link
CN (1) CN208596662U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110364464A (en) * 2019-08-14 2019-10-22 常州科沛达清洗技术股份有限公司 Full-automatic multi-functional paster apparatus and full-automatic paster technique
CN110620065A (en) * 2019-08-26 2019-12-27 石狮市纳傲贸易有限公司 Wafer processing equipment
CN113771375A (en) * 2021-09-16 2021-12-10 深圳市阿龙电子有限公司 Patch device with heat equalization function for intelligent manufacturing of tablet personal computer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110364464A (en) * 2019-08-14 2019-10-22 常州科沛达清洗技术股份有限公司 Full-automatic multi-functional paster apparatus and full-automatic paster technique
CN110364464B (en) * 2019-08-14 2024-02-06 常州科沛达清洗技术股份有限公司 Full-automatic multifunctional paster device and full-automatic paster process
CN110620065A (en) * 2019-08-26 2019-12-27 石狮市纳傲贸易有限公司 Wafer processing equipment
CN113771375A (en) * 2021-09-16 2021-12-10 深圳市阿龙电子有限公司 Patch device with heat equalization function for intelligent manufacturing of tablet personal computer

Similar Documents

Publication Publication Date Title
CN208596662U (en) A kind of wafer paster apparatus of optical splitter
CN109277823A (en) A kind of LED light automatic assembly equipment
CN108520862A (en) A kind of optical branching device wafer paster apparatus of fast assembling-disassembling glue brush
CN206684416U (en) The full-automatic contraposition design device that FPC is bonded with FPC hot pressing on LCD glass
CN107234414B (en) Automatic zoom lens assembling equipment based on image recognition and automatic overturning and feeding
CN112974150A (en) Multi-station automatic dispensing equipment
CN208596661U (en) A kind of optical splitter wafer paster apparatus of fast assembling-disassembling glue brush
CN111715476A (en) Full-automatic glue dispensing system for VCM module
CN108550545A (en) A kind of wafer paster apparatus of optical branching device
CN109445055A (en) It is a kind of for optical filter to be mounted on to the full-automatic placement equipment of lens
CN205270030U (en) Automatic adhesive deposite device of slide rail formula
CN103721887A (en) Coating brushing machine for aluminum alloy rim
CN214843060U (en) Quick aligning device for concentricity of photoelectric detector
CN207223190U (en) LED light string automatically assembles equipment and its welding mechanism
CN214917526U (en) Optical device paster is with dipping in gluey equipment
CN216519052U (en) Device for automatically pasting isolator on V300 three-way shell
CN111889315B (en) Glue dispensing device for integrated circuit
CN201136329Y (en) Semi-automatic grease-coating film-facing machine
CN205034213U (en) Frock is pasted to car glass rain sensilla
CN209888004U (en) Spin coating forming integrated device
CN113102157A (en) Optical device paster is with dipping in gluey equipment
CN102569610A (en) Method for coating surface of vertical-structure wafer of LED with fluorescent glue
CN203221004U (en) Automatic coating equipment for electrode surface coating glass
CN206509196U (en) A kind of equipment assembled for gluing and magnetic holder
CN220514617U (en) Movable dispensing platform

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20190312

Termination date: 20200628