CN1227394C - Steel wire spring clamp head, wire-guiding frame conveying belt and electroplating system - Google Patents
Steel wire spring clamp head, wire-guiding frame conveying belt and electroplating system Download PDFInfo
- Publication number
- CN1227394C CN1227394C CNB001217321A CN00121732A CN1227394C CN 1227394 C CN1227394 C CN 1227394C CN B001217321 A CNB001217321 A CN B001217321A CN 00121732 A CN00121732 A CN 00121732A CN 1227394 C CN1227394 C CN 1227394C
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- Prior art keywords
- travelling belt
- arm
- wire spring
- chuck
- circle
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
-
- 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
Abstract
A wire spring grip is provided to easily repair a grip, by making a gearing part in parallel with a belt web, such that the gearing part is used together with the grip clip-fixed to a place on a belt so that the grip can easily be replaced.The wire spring grip includes a wire to supply two arms extending from a curved part. A part of the respective arms is formed in a repeatedly-wound coil. The curved part forms a holding part of the spring grip. An end part of the respective arms forms a connection part for connecting a lead frame carrier belt to the grip.
Description
Technical field
The present invention relates to semiconductor integrated circuit (hereinafter to be referred as IC) lead frame and pinch band, particularly utilize the P-Dips method to electronic component be with-be with or roll up-roll up galvanized travelling belt.
Background technology
In the encapsulating electronic components field, well-known, should electroplate stretching out the outer lead-in wire of insulating sealed layer before use.Generally, the flat pronged shape that goes between and be the right cylinder silk or determine from the plate upper punch.No matter what shape all must be electroplated silk, such as copper facing or plating iron base alloy, thereby provide corrosion and mechanical protection, help simultaneously being connected with other elements by for example soldering.In the situation of back, if lead ferrous alloy manufacturing was then generally plated one deck copper as thin as a wafer earlier before zinc-plated.
Traditional for example rack plating and barrel plating method have been contained in plating piece, and the method by a series of treatment station replaces on handling machinery or the travelling belt.
In US-A-4534843, propose a kind of contact member and carry out electro plating device encapsulating electronic components.By each a plurality of treatment station that comprise main coating bath, travelling belt plays a part one of electrode of electroplating current supply system to plating piece simultaneously on a flexibility made from electro-conductive material, continuous conveyor.The travelling belt of this invention is made of a Stainless Steel Band by horizontal circulatory motion, and the web of band is vertical.As shown in Figure 1, the part of this band is clamped an element band.Lower edge with 1 makes the flexible jaw 2 of a row, is suitable for disposing the salient 3 that cam touches with side direction for the successive jaw has been equipped with in the tape alternation both sides.When being with 1 transfixion, cam makes jaw separately, and the centre of jaw 2 filled in an element band 4 by a feeding device.Cam and salient 3 are thrown off, and pawl 2 is clamped element band 4.So just being clamped by travelling belt, part passes through treatment station.Plating back cam sheds element band 4 to jaw 2 effects.
A shortcoming of structure shown in Figure 1 is that the frictional force of jaw generation is minimum.Clamping force is little to have limited the maximum weight of the element that travelling belt can deliver.In addition, through behind the life-time service, the clamping force of jaw reduces trend.Because jaw is an integral part of travelling belt, therefore when clamping force is reduced to unacceptable level, just must change the whole piece travelling belt.
Someone once proposed improved suggestion to the P-Dips band conveying belt of above-mentioned United States Patent (USP).Once proposed the travelling belt shown in a kind of Fig. 3 a, the flaky movable tool that clamps of a plurality of stainless steel springs was arranged on it.One of each reed 5 has a thin slice that stretches out 6 with meeting at right angles.Thin slice 6 inserts in the slit 7 of travelling belts 1, and the front of being close to travelling belt 1 is fixed spring.Each spring 5 is stretched from the web of travelling belt with all meeting at right angles.Spring pinchcock 8 extends the bottom towards the travelling belt web from curved portions 9, and it passes a hole 10 at this place.The curved apex 11 of spring pinchcock 8 is hooked the edge in hole, thereby makes spring pinchcock by side pressure and flat leaning against on the web of travelling belt.Top 11 extends to the base of travelling belt web, thereby becomes the instrument of clamping.Spring pinchcock can equally with the jaw among the US-A-4534843 be opened, so that automatic charge and discharging.The reed jaw is compared with the US-A-4534843 jaw, degenerates in case its advantage comprises clamping force, just can change each in the jaw.Jaw can be with manually taking from travelling belt simply.But the clamping force of reed jaw is still less, and it is very fast to degenerate, so need often to change.
In every kind of IC lead frame conveying belt of above-mentioned prior art, the ultimate load that can deliver is about every 5cm travelling belt 300g or each clamping point 160g, and this is not enough for for example volume-volume electro-plating method.In the Britain registration design No.2074865 of electronics manufacturer association of non-government organization (AEM Pte), another travelling belt is proposed, it is used the reed of above-mentioned the 2nd kind of travelling belt instead two circle wire springs and replaces.Fig. 2 represents this travelling belt of AEM design.Travelling belt 1 is similar with previous designs, and represents in Fig. 3 b.Clamping tool is made of the Stainless Steel Wire spring 12 that a plurality of cross-sectional diameters are about 1.2mm.Wire spring 12 is to be fixedly clamped with the identical mode of Fig. 3 a reed.The arcuate center portion 13 of each wire spring 12 is used as a thin slice 6a after through twice bending and inserts by the slit on the travelling belt 1.
Two arms of spring meet at right angles by travelling belt and stretch out.Every arm forms the spring ring of a series of 2 circles of having an appointment at central part.Each spring ring abuts against on the travelling belt 1, and the end of arm folder stretches out by two vertical clearance gap 15 of travelling belt 1 bottom, shown in Fig. 3 b.On its top 16, arm is bent to two steel wire jaws, and it has replaced an independent wide top 11 of reed design.As can be seen, the side (side-view) of wire spring clamping tool is identical with reed clamping tool basically except spring ring is arranged.Wire spring clamps tool and compares with reed clamping tool, and advantage is to compare with prior art, and clamping force is increased to about 200g on each clamping point.
Spring clamps on the tool owing to there is spring ring, thereby increased jaw and act on the power on the slit downwards and abut against power on the travelling belt.In order to open jaw, must in the travelling belt web plane, upwards pull jaw, so that it is lifted from the slit, thereby between the web of bend and travelling belt, form a space.Therefore, the tension force size in the spring is decided by to be added in the maximum value of the pressure of opening jaw on the spring.In order to change the clamping tool, must pull open clamp jaw fully.Therefore, maximum clamping force is considered decision by the practicality of charging and shedding mechanism, also by shedding the decision that needs that clamps tool easily.
The phenomenon that all above-mentioned prior arts are long whisker perplexs.Long whisker is the tendency of thin crystalline substance on the protruding surface of metallic growth of class such as tin.When web passed through the speed increase of electroplanting device, the trend of long whisker just strengthened greatly.Not only owing to the aesthetic conceptions problem, the corrosion property when also occurring in coating bath owing to it is out of favour long whisker.Long whisker phenomenon also can cause electrical short, especially when lead-in wire density is high.
Summary of the invention
An object of the present invention is to overcome at least some problem that above-mentioned every kind of prior art product brings.Particularly, an object of the present invention is to propose a kind of wire spring and clamp tool, its clamping point is less, opens easily in case of necessity and changes, and keeps higher clamping force simultaneously on the IC lead frame.
Therefore, the present invention proposes a kind of wire spring chuck of the IC of being used for lead frame conveying belt, and it is made of a spring wire.It begins to stretch out two arms from curved portions after being shaped, and every arm all forms the circle that is made of a plurality of circles.Wherein said curved portions constitutes the clamping section of spring collet; The wire spring chuck of using with a kind of IC lead frame conveying belt, it comprises a steel wire, two arms that extend out from a curved portions are provided after the shaping, and the part of every arm makes the circle of a plurality of circles, and wherein said curved portions forms the clamping section of spring collet; And between each circle and curved portions, every brachiocylloosis forms contact part, is used for to overcome the circle internal tension arm being pushed on one side.
In the present invention, because the central part of spring wire forms clamp jaw, the problem of long whisker has been eliminated or has been solved substantially in the existence of circular edge.
The termination of every arm forms a connection section, is used for chuck and lead frame conveying belt are coupled together.
The termination of every arm can be bent to form the arm top ends, is used for and the engagement of travelling belt web, and chuck is fixed.Each top ends curves 90 ° ± 2 ° substantially by the plane of the arm that comprises direct vicinity.
Curved portions can curve described clamping section by the plane that comprises the arm that is directly adjacent to curved portions.Form and the planar angle that comprises contiguous arm is approximately 117 ° ± 2 ° by curved portions.
Between each circle and curved portions, every arm all curves one and touches portion, is used to overcome the circle internal tension, and arm is pushed on one side.The angle that is formed by arm between each circle and curved portions is about 127 ° ± 2 °.
The arm of every wire spring has the circle that is made of 3 circles at least.
Being close to the angle that forms between two portions of each circle at each arm may be greater than 90 ° ± 2 °.Be close to the angle that forms between two portions of each circle at each arm and preferably be about 132 ° ± 2 °.
The cross-sectional diameter of spring wire is about 1mm.
The present invention also proposes a travelling belt that is used to deliver IC band or lead frame, and it comprises a plurality of above-mentioned wire springs.
Travelling belt can have a round, and these holes have an axis, and is parallel with the travelling belt edge, a limit of next-door neighbour's travelling belt, and these holes are in order to admit the curved portions of described chuck.
Travelling belt has a round, and these holes have an axis, and is parallel with the travelling belt edge, the central part of next-door neighbour's travelling belt, and these holes are in order to admit the top ends of chuck.
For each chuck on the described travelling belt, the part of the nearly circle of its each arm rest all can stretch to a limit of described travelling belt, and parallel with the web of travelling belt basically.
On the other hand, the present invention proposes an electroplating system that is used for the IC assembly, it comprises a plurality of processing stations and a horizontal conveyor, and this handling machinery comprises a travelling belt, transmits web that has an arranged perpendicular and the removable jaw that comprises with the teamwork of above-mentioned wire spring chuck.This system disposes a plurality of rollers below handling machinery, be used for holding from the below IC assembly.
This system can comprise automatic charge station and discharge terminal, and each station comprises two reels of supplying and accepting the IC frame strips at least.
Description of drawings
Only illustrate in greater detail the present invention now by example contrast accompanying drawing, wherein:
Fig. 1 is the skeleton view according to the IC band conveying belt part of prior art;
Fig. 2 a and 2b represent orthographic plan and the side-view according to another routine IC lead frame conveying belt chuck of prior art respectively;
Fig. 3 a represents according to the IC lead frame conveying belt of the another example of prior art and the side-view and the frontview of chuck;
Fig. 3 b represents according to the IC lead frame conveying belt of prior art second example shown in Figure 2 and the side-view and the frontview of chuck;
Fig. 3 c represents side-view and the frontview according to IC lead frame conveying belt of the present invention and chuck;
Fig. 4 a and 4b represent orthographic plan and the side-view according to IC lead frame conveying belt chuck of the present invention respectively;
Fig. 5 represents a skeleton view that belongs to module together, and this module constitutes according to the present invention's volume-volume on the other hand or the part of band-tape handling system;
Fig. 6 is the side sectional view according to the part of the module system of an embodiment;
Fig. 7 is the side-view according to the reinforced station drive unit of an embodiment;
Fig. 8 is the orthographic plan of Fig. 7 drive unit;
Fig. 9 is the discharge terminal orthographic plan according to an embodiment.
Embodiment
According to Fig. 3 c, 4a and 4b, transmission of the present invention has a plurality of clips made from stainless steel 316 spring wires 20.The design of travelling belt 100 and prior art travelling belt 1 is slightly different, so that adapt to wire spring chuck of the present invention.In one embodiment, each chuck is shaped with the Stainless Steel Wire of cross-sectional diameter 1mm.See the most clearly from Fig. 4, after spring wire is shaped, two parallel arms 21 of 3mm are at interval arranged, they are from central part 22 stretching, extensions of a basic semicircle.Central part 22 and close arm form about 117 ° angle, thereby constitute clamping section 22.Form an arm top ends 23 that is about 5.5mm after the tip bend of every arm.On close every arm 21 of top ends 23, make the circle 24 of the about 3.5mm of radius.Enclose the 3 circles of having an appointment.
Between each circle 24 and central part 22, each arm all is bent to form the portion of touching 25, is used for overcoming circle tension force, and arm is pushed on one side.Enclose to the length of brachiocylloosis place and be about 13.7mm.From the knee of arm to the clamping section, the steel wire of the 8mm that has an appointment.
In the present embodiment, the franchise of angle is ± 2 °, and dimensional tolerances is generally ± 0.2mm.
Chuck 20 detachably is fixed on the travelling belt 100, and its method is that top ends 23 is inserted by the hole on a series of travelling belts 100 tops.In the bottom of travelling belt 100, a plurality of parallel square holes or rectangular opening 27 are arranged, be used to admit clamping section 22.Each clamping section 22 is forced upwardly and inwardly overcomes tension force in the circle 24, abuts in the front of travelling belt web by hole 27.Utilize cam mechanism to push the portion of touching 25, clamping section 22 just can be left travelling belt 100 and form a lead frame admitting the element band.Further push the portion of touching 25, chuck can be shed, this point can be with manually reaching.
Lead frame of the present invention or element band conveying belt can be used with the charged plating of general prior art P-Dips system, and what for example illustrate in US-A-4534843 is such.Illustrate according to the present invention's electroplating system on the other hand referring now to Fig. 5～9.The applicant has designed an electroplating system, and it comprises the module or the treatment trough of a plurality of employing modular constructions.Fig. 5 represents the independent treatment station according to an embodiment.Top cover 31 covers tank and the supply line to groove 32 supply liquid state or gaseous component.What be useful on exhaust control knob etc. on the top cover 31 uncaps 33.This groove itself for example can be coating bath, and it can be uncapped by one and 34 cover, and this can be uncapped and 34 can be transparent or transparent observing portion 35 is arranged.This can be uncapped and 34 generally make with polypropylene.The travelling belt (not shown) is carried an assembly band and is passed through groove 32 through lateral sealing 36.
Electroplating system of the present invention has a plurality of such grooves or similar treatment station, and they include, but is not limited to following one or more groove: cleaning, descaling, electric deburring, anode activation, with house steward's water flushing, by spray and/or high pressure spraying with deionized water rinsing, electric oil removing, acid etching, zinc-plated, neutralize, brush, dry, isolation (buffering) and dismantling.Treating processes as required and product also can comprise other groove or station or replace with them.
One at these grooves or module treatment process line has a self-feeder, an automatic discharger is then arranged in the other end.
Fig. 6 represents the cross section of this processing line part.The travelling belt 100 that carries Scroll lead frame 40 flatly hangs, and makes the web of travelling belt vertical.Travelling belt 100 uses chuck 20 delivery lead frames 40.Fig. 5 represents the part of at least 3 different slots, and travelling belt successively by wherein each: pre-preg groove 41, isolation channel 42 and electroplating processes groove 43.
In the present embodiment, lead frame is not to be transmitted band simply and chuck is fixed, but also is held by the roller 44 (Fig. 6 represents one of them) of a plurality of arranged spaced.The height of roller 44 can change by regulating reservoir performer 45, so that adapt to the lead frame of different size.Lead frame is owing to being subjected to the clamping and the supporting of present embodiment system up and down, so can guarantee not have the generation of dropping behind long-play.
Fig. 7 and 8 represents the side-view and the orthographic plan of self-feeder of the present invention and drive unit 50 respectively.Self-loading device has a two reel system, allows incessantly with component feeding travelling belt 100.Each has its roller system reel A and reel B, comprises the tension roller 51 that is driven by compressed air cylinder 52 in the system.The lead frame reel is by X-Y protractor 53 location that comprise steady arm 53a.The position of mobile protractor 53 is so that acceptance is from the lead frame of reel A or reel B.
The also available hand charging of lead frame.Be equipped with an adjustment height conveyor drive arrangement 54, and a manual band lead frame of loading (strip lead frame) 55 is gone up on the top.Conveyor drive arrangement 54 or reel A and B are with the protractor 56 on the frame strips supply top, and protractor re-uses air brake (gripper) 57 and 58 frame strips is supplied with the jaw of opening on the travelling belt 100.Travelling belt 100 is driven by roller 59 and ceaselessly carries out circulatory motion.Utilize a camming (not shown) to open jaw automatically.
In the other end of travelling belt 100 continuous loops a discharge terminal is arranged, it comprises an automatic volume-volume dumper 60.The roller 59 of drive wheel and loading terminal 50 together with travelling belt 100.Have a frame strips and unload charging tray, be used for the lead frame of hand charging.A band of accepting lead frame by the tension roller 63 of air-operated drive by roller 64 from handling machinery.Discharge terminal also has two A of reel system and B, is used for accepting band by roller 64 and tension roller 63 from handling machinery, and makes the unlikely interruption of discharging.
Electroplating system of the present invention both had been applicable to band-charged plating, also was applicable to volume-volume plating.This handling machinery can support heavy assembly or narrow horizontal lead frame (rail bar leadfram), as the TO220 assembly.Native system can carry out operations such as tining to assembly-its scope of all patterns to the TO device from DIPs, SOLCs, PLCCs, QFPs.
Self-loading device has two vertical feed bins of arranging, and is used for band is installed to handling machinery.Lead frame utilize roller from following and above supported.
Spring of the present invention clamps the clamping force of tool and the wire spring chuck of prior art conforms to, but the contact of the point on the unit length is then less.Travelling belt of the present invention provides the clamping force of about 300g on each clamping point.The every circle of spring pinchcock of the present invention has 3 whole circles, and the wire spring chuck of prior art then has only 2 whole circles.Circles many in the circle make the life-span of chuck increase about 10%.A feature of wire spring chuck of the present invention is on the spring wire arm knee to be arranged, thereby the portion of touching is provided.This portion of touching in use, and is that is substantially parallel with the web of travelling belt when chuck is fixed on the travelling belt, thereby is easy to for replacing the chuck removal.So spring collet of the present invention provides bigger servicing ease.
Though embodiments of the invention are illustrated, but those skilled in the art it is contemplated that different improvement projects and do not break away from the scope of the invention that limits in the appended claims of back that particularly the size according to the wire spring chuck can change all angles.
Claims (14)
1. wire spring chuck that IC lead frame conveying belt is used, it comprises a steel wire, two arms that extend out from a curved portions are provided after the shaping, and the part of every arm makes the circle of a plurality of circles, and wherein said curved portions forms the clamping section of spring collet; With
Between each circle and curved portions, every brachiocylloosis forms contact part, is used for to overcome the circle internal tension arm being pushed on one side.
2. according to the described wire spring chuck of claim 1, wherein form an arm top ends after the tip bend of every arm, be used for web with travelling belt and engage and fix chuck.
3. according to the described wire spring chuck of claim 2, wherein the plain bending of the self-contained arm with this top ends next-door neighbour of each top ends is 90 ° ± 2 °.
4. according to the described wire spring chuck of above-mentioned any one claim, it is characterized in that the plain bending of the arm of the self-contained next-door neighbour's curved portions of described curved portions forms described clamping section.
5. according to the described wire spring chuck of claim 4, it is characterized in that curved portions and the formed angle in plane that comprises the arm adjacent with this curved portions are 117 ° ± 2 °.
6. according to the described wire spring chuck of claim 1, it is characterized in that the angle that is formed by this arm is 127 ° ± 2 ° between each circle and curved portions.
7. according to the described wire spring chuck of claim 1, it is characterized in that every arm of wire spring has a circle that comprises 3 circles at least.
8. according to the described wire spring chuck of claim 1, the angle that it is characterized in that forming between two portions of every the arm that is close to each circle is greater than 90 ° ± 2 °.
9. according to the described wire spring chuck of claim 8, it is characterized in that the angle that forms is 132 ° ± 2 ° between two portions of each arm that is close to each circle.
10. according to the described wire spring chuck of claim 1, the cross-sectional diameter that it is characterized in that steel wire is 1mm.
11. a travelling belt that delivers IC band or lead frame, it comprises a plurality of as the described wire spring chuck of above-mentioned any one claim.
12. according to the described travelling belt of claim 11, it is characterized in that this has been with a round, these Kong Youyi bars are parallel with the limit of this travelling belt and near the axis on a limit wherein, these holes are used to admit the curved portions of described chuck.
13. according to the described travelling belt of claim 11, it is characterized in that this has a round, these Kong Youyi bars are parallel with the limit of travelling belt, and the axis of close travelling belt web central part, these holes are used to admit the top ends of chuck.
14., it is characterized in that the part of contiguous this circle of its each arm all stretches towards a limit of described travelling belt, and is parallel with the web of travelling belt substantially according to the described travelling belt of claim 11 to each chuck on the described travelling belt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SG9905316A SG80658A1 (en) | 1999-10-25 | 1999-10-25 | Wire spring grip, lead frame carrier belt & plating system |
| SG99053167 | 1999-10-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1296088A CN1296088A (en) | 2001-05-23 |
| CN1227394C true CN1227394C (en) | 2005-11-16 |
Family
ID=20430453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001217321A Expired - Fee Related CN1227394C (en) | 1999-10-25 | 2000-07-25 | Steel wire spring clamp head, wire-guiding frame conveying belt and electroplating system |
Country Status (5)
| Country | Link |
|---|---|
| KR (1) | KR100423962B1 (en) |
| CN (1) | CN1227394C (en) |
| MA (1) | MA24634A1 (en) |
| MY (1) | MY122640A (en) |
| SG (1) | SG80658A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101268297B1 (en) * | 2011-07-12 | 2013-05-28 | 주식회사 에이에스티젯텍 | Feeding belt for strip-shaped elements |
| DE102014212155A1 (en) * | 2014-06-25 | 2015-12-31 | Continental Automotive Gmbh | Bearing device for a shaft, in particular a turbocharger device |
| CN110316515A (en) * | 2019-08-09 | 2019-10-11 | 山东晶导微电子股份有限公司 | A kind of plating insulation transmission steel band |
| CN112626605B (en) * | 2020-12-07 | 2022-01-14 | 北京泰杰伟业科技有限公司 | Clamp capable of continuously processing electrochemical polishing anode electrode |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1357447A (en) * | 1971-06-10 | 1974-06-19 | Plastestrip Ltd | Spring clips for joint cover strips |
| EP0242962A1 (en) * | 1986-04-25 | 1987-10-28 | Inmos Corporation | Offset pad semiconductor lead frame |
| US5264002A (en) * | 1990-04-23 | 1993-11-23 | Mitsubishi Danki Kabushiki Kaisha | Method for conveying semiconductor lead frame strip with an apparatus having vertically movable guide rails |
| JPH0629328A (en) * | 1992-07-08 | 1994-02-04 | Ebara Corp | Gripping jig for semiconductor lead frame |
-
1998
- 1998-08-17 MA MA25213A patent/MA24634A1/en unknown
-
1999
- 1999-10-25 SG SG9905316A patent/SG80658A1/en unknown
-
2000
- 2000-06-30 MY MYPI20002997A patent/MY122640A/en unknown
- 2000-07-05 KR KR10-2000-0038291A patent/KR100423962B1/en not_active IP Right Cessation
- 2000-07-25 CN CNB001217321A patent/CN1227394C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| SG80658A1 (en) | 2001-05-22 |
| MA24634A1 (en) | 1999-04-01 |
| CN1296088A (en) | 2001-05-23 |
| MY122640A (en) | 2006-04-29 |
| KR20010069219A (en) | 2001-07-23 |
| KR100423962B1 (en) | 2004-03-22 |
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Granted publication date: 20051116 Termination date: 20130725 |