CN102284977B - Die-cutting, forming and separating die for integrated circuit without pins - Google Patents
Die-cutting, forming and separating die for integrated circuit without pins Download PDFInfo
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- CN102284977B CN102284977B CN 201110244428 CN201110244428A CN102284977B CN 102284977 B CN102284977 B CN 102284977B CN 201110244428 CN201110244428 CN 201110244428 CN 201110244428 A CN201110244428 A CN 201110244428A CN 102284977 B CN102284977 B CN 102284977B
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Abstract
The invention belongs to the technical field of die-cutting, forming and separating of integrated circuits and specifically relates to a die-cutting, forming and separating die for a DFN (dual-flat no-lead)/QFN (quad-flat no-lead) type flat integrated circuit without pins. The separating die comprises a framework-like fixed seat, wherein the top surface and bottom surface of the fixed seat are open, the middle part of the fixed seat is communicated with openings on the top surface and bottom surface of the fixed seat, and a closed discharge channel is enclosed at the middle part of the fixed seat; and a separating mechanism which is fixedly erected on the fixed seat and strides over the discharge channel is arranged at the upper part of the fixed seat. The separating die provided by the invention can not only meet the strength requirements of parts of the die, but also greatly provide a discharge space, meet the large-bath production demand of DFN/QFN type products, reduce the loss of a knife edge part, shorten the maintenance time of the die, improve the production efficiency and simultaneously reduce the loss of spare parts.
Description
Technical field
The invention belongs to IC punching moulding separation technology field, be specifically related to a kind of punching molding peel of mould for DFN/QFN class flat non-pin adhesive integrated circuit.
Background technology
Along with electronic system product is fast-developing to miniaturization, portable direction, and the integrated antenna package product is to microminiaturization, high density, without future developments such as pins, and QFN, the DFN type miniature integrated circuit encapsulating products market demand are with increasing.Because this series products plastic-sealed body is constantly to small and exquisite slim development, compact dimensions and the appearance requirement of product also improved constantly.For the manufacturing of surface mount series products, the punching molding of pin also just becomes a procedure relatively more crucial in the whole encapsulation industry.In existing punching molding operation, the arrangement of general operation is normally such: rush cast gate, rush the air discharge duct operation → cut the muscle punching and mould operation → separation circuit.Separating later product directly enters in the magazine.The last moulding of DFN product is directly to cut off to separate, and product is separated with lead frame.
Because DFN/QFN series products volume is very little very thin, its volume generally is 3mm * 3mm * 0.8mm(thickness), and product is very light, only have several grammes per square metres, therefore product is separating laggard very unstablely when entering magazine, usually owing to the disturbance of the air-flow of the waste suction slag die face of blowing out, is scattered on the die surface, cause the damage of mould and cutting edge piece, cause simultaneously product rejection.
Summary of the invention
The purpose of this invention is to provide a kind of for the punching molding peel of mould without the pin adhesive integrated circuit, this mould can satisfy the demand of the production in enormous quantities of DFN/QFN series products, reduce loss and the mould preventive maintenance time of edge pieces, when enhancing productivity, also reduced the loss of spare part.
For achieving the above object, the technical solution adopted in the present invention is: a kind of for the punching molding peel of mould without the pin adhesive integrated circuit, this separation mould comprises the holder of frame-like, the end face of holder and bottom surface all are set to uncovered shape, the middle part of holder is uncovered with the end face of holder and the bottom surface is uncovered is connected, and the middle part of described holder surrounds the tapping channel of closed; The top of described holder is provided with fixed mount and is located on the holder and across the separating mechanism above tapping channel.
Simultaneously, the present invention can also be able to further realization by following technical measures:
The edge of described tapping channel is rectangular perpendicular to the cross section on the discharging direction, described holder is set to step-like along the both sides of rectangle tapping channel long side direction, and the step surface of step-like sidepiece is from reducing step by step away from tapping channel one side near tapping channel one side direction; Described step-like sidepiece is provided with a plurality of parallel grooves of arranging along described rectangle tapping channel long side direction, and the flute length direction of described groove is parallel with the short side direction of rectangle tapping channel, and described separating mechanism is embedded in the groove.
Described separating mechanism consists of by separating single-piece and separation assembly, separate single-piece and be set to two, and two are separated single-pieces and divide and be located near in the groove of step-like sidepiece end, two separate be provided with between the single-pieces a plurality of parallel that arrange, be embedded the separation assembly in groove.
Described separation assembly comprises the separation die that is arranged on upside, also comprises being arranged on the tabular lip block that separates the die downside; Described separation die is tabular, and separate die be embedded both ends in groove be set to holder match along the both sides of rectangle tapping channel long side direction step-like, be provided with recess on the biside plate face in the tapping channel zone of being in of described separation die; The plate body thickness of described lip block matches with the plate body thickness that is provided with the recess place that separates die, and the biside plate face that is provided with the recess place of described separation die is mutually concordant with the corresponding biside plate face of lip block; Described separation single-piece is the separation die that is embedded separately in the close groove of step-like sidepiece end; The step-like sidepiece place of described holder is provided with described separation die and lip block is fixed on pressing plate on the holder.
Described separation die is wear-resisting hard alloy spare, and described lip block is the steel strutting piece.
Beneficial effect of the present invention is: the present invention not only can satisfy the requirement of strength of mould parts, simultaneously also provide greatly material space, satisfied the demand of the production in enormous quantities of DFN/QFN series products, reduce loss and the mould preventive maintenance time of edge pieces, when enhancing productivity, also reduced the loss of spare part.
Description of drawings
Fig. 1 is exploded sketch of the present invention;
Fig. 2 is the structural representation behind the component assemble of the present invention;
Fig. 3 is the structural representation of the state that partly dissects of Fig. 2.
The implication of mark is as follows among the figure:
1-holder 2-separation die 3-lip block 4-pressing plate
11-tapping channel, 12-groove.
Embodiment
Shown in Fig. 1～3, a kind of for the punching molding peel of mould without the pin adhesive integrated circuit, this separation mould comprises the holder 1 of frame-like, the end face of holder 1 and bottom surface all are set to uncovered shape, the end face of the middle part of holder 1 and holder 1 is uncovered and the bottom surface is uncovered is connected, and the middle part of described holder 1 surrounds the tapping channel 11 of closed; The top of described holder 1 is provided with fixed mount and is located on the holder 1 and across the separating mechanism above tapping channel 11.
Further, the edge of described tapping channel 11 is rectangular perpendicular to the cross section on the discharging direction, described holder 1 is set to step-like along the both sides of rectangle tapping channel long side direction, and the step surface of step-like sidepiece is from reducing step by step away from tapping channel 11 1 sides near tapping channel 11 1 side direction; Described step-like sidepiece is provided with a plurality of parallel grooves 12 of arranging along described rectangle tapping channel long side direction, and the flute length direction of described groove 12 is parallel with the short side direction of rectangle tapping channel, and described separating mechanism is embedded in the groove 12.
Described separating mechanism consists of by separating single-piece and separation assembly, separate single-piece and be set to two, and two are separated single-pieces and divide and be located near in the groove 12 of step-like sidepiece end, two separate be provided with between the single-pieces a plurality of parallel that arrange, be embedded the separation assembly in groove 12.
As preferred version of the present invention, described separation assembly comprises the separation die 2 that is arranged on upside, also comprises being arranged on the tabular lip block 3 that separates die 2 downsides; Described separation die 2 is tabular, and separate die 2 be embedded both ends in groove 12 be set to holder 1 match along the both sides of rectangle tapping channel long side direction step-like, be provided with recess on the biside plate faces in tapping channel 11 zones of being in of described separation die 2; The plate body thickness of described lip block 3 matches with the plate body thickness that is provided with the recess place that separates die 2, and the biside plate face that is provided with the recess place of described separation die 2 is mutually concordant with the corresponding biside plate face of lip block 3; Described separation single-piece is the separation die 2 that is embedded separately in the close groove 12 of step-like sidepiece end; The step-like sidepiece place of described holder 1 is provided with described separation die 2 and lip block 3 is fixed on pressing plate 4 on the holder 1.
Further, described separation die 2 is wear-resisting hard alloy spare, and described lip block 3 is the steel strutting piece.Described separation die 2 makes to guarantee that by carbide alloy it has high rigidity and high-wearing feature, and one time sharpening can be die-cut 1,000,000 times, and every a slice is separated die can sharpening 3 times.
The present invention will be further described below in conjunction with Fig. 1～3:
Separate die 2 and lip block 3 and all be assemblied in the corresponding groove 12 of holder 1, be lined with the lip block 3 that steel alloy is made by seeing among Fig. 3 below the separation die 2 that carbide alloy is made, then with pressing plate 4 the two is fixed.The benefit of this structure is to have utilized simultaneously the high rigidity of cemented carbide parts and intensity and the toughness of high-wearing feature and steel component.Separation die with respect to conventional structure, separation die 2 among the present invention can be accomplished very little, solved simultaneously the problem of its undercapacity, therefore the present invention can provide the leakage material space larger than conventional structure, we can see in Fig. 3, whole device has the cavity of half can form the cavity of connection, and conventional structure can only be single cavity, can not be communicated with to form integral cavity.The cutting edge piece life-span of cutting edge piece life-span among the present invention than conventional structure will exceed 5～7 times, and simultaneously its discharging is smooth and easy, the phenomenon that product is blown out can not occur; And conventional structure can only reduce the probability that this type of phenomenon occurs, and still can not eliminate the phenomenon that product is blown out fully.
In sum, the present invention has following features:
1, separates the carbide alloy manufacturing that die adopts high rigidity, high-wearing feature;
2, be lined with the lip block of steel structure below the separation die, to be used to provide preferably toughness and intensity;
3, the product discharge space forms the cavity that is communicated with, to guarantee the smooth and easy discharging of product.
Claims (1)
1. punching molding peel of mould that is used for without the pin adhesive integrated circuit, it is characterized in that: this separation mould comprises the holder (1) of frame-like, end face and the bottom surface of holder (1) all are set to uncovered shape, the end face of the middle part of holder (1) and holder (1) is uncovered and the bottom surface is uncovered is connected, and the middle part of described holder (1) surrounds the tapping channel (11) of closed; The top of described holder (1) is provided with fixed mount, and to be located at holder (1) upper and across the separating mechanism in tapping channel (11) top;
The edge of described tapping channel (11) is rectangular perpendicular to the cross section on the discharging direction, described holder (1) is set to step-like along the both sides of rectangle tapping channel long side direction, and the step surface of step-like sidepiece is from reducing step by step away from tapping channel (11) one sides near tapping channel (11) one side direction; Described step-like sidepiece is provided with a plurality of parallel grooves (12) of arranging along described rectangle tapping channel long side direction, the flute length direction of described groove (12) is parallel with the short side direction of rectangle tapping channel, and described separating mechanism is embedded in the groove (12);
Described separating mechanism consists of by separating single-piece and separation assembly, separate single-piece and be set to two, and two are separated single-pieces and divide and be located near in the groove (12) of step-like sidepiece end, two separate be provided with between the single-pieces a plurality of parallel that arrange, be embedded the separation assembly in groove (12);
Described separation assembly comprises the separation die (2) that is arranged on upside, also comprises being arranged on the tabular lip block (3) that separates die (2) downside; Described separation die (2) is tabular, and separate die (2) be embedded both ends in groove (12) be set to holder (1) match along the both sides of rectangle tapping channel long side direction step-like, be provided with recess on the biside plate face in tapping channel (11) zone of being in of described separation die (2); The plate body thickness of described lip block (3) matches with the plate body thickness that is provided with the recess place that separates die (2), and the biside plate face that is provided with the recess place of described separation die (2) is mutually concordant with the corresponding biside plate face of lip block (3); Described separation single-piece is the separation die (2) that is embedded separately in the close groove (12) of step-like sidepiece end; The step-like sidepiece place of described holder (1) is provided with described separation die (2) and lip block (3) is fixed on pressing plate (4) on the holder (1);
Described separation die (2) is wear-resisting hard alloy spare, and described lip block (3) is the steel strutting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110244428 CN102284977B (en) | 2011-08-25 | 2011-08-25 | Die-cutting, forming and separating die for integrated circuit without pins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110244428 CN102284977B (en) | 2011-08-25 | 2011-08-25 | Die-cutting, forming and separating die for integrated circuit without pins |
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| Publication Number | Publication Date |
|---|---|
| CN102284977A CN102284977A (en) | 2011-12-21 |
| CN102284977B true CN102284977B (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110244428 Active CN102284977B (en) | 2011-08-25 | 2011-08-25 | Die-cutting, forming and separating die for integrated circuit without pins |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2348490Y (en) * | 1998-10-26 | 1999-11-10 | 台中三洋电子股份有限公司 | Semiconductor packing device |
| JP2004055860A (en) * | 2002-07-22 | 2004-02-19 | Renesas Technology Corp | Semiconductor device fabricating process |
| JP2007125667A (en) * | 2005-11-07 | 2007-05-24 | Disco Abrasive Syst Ltd | Cutting device of substrate |
| CN2920476Y (en) * | 2006-06-17 | 2007-07-11 | 铜陵三佳科技股份有限公司 | Variable pitch step separation type blanking suide rail |
| CN100447981C (en) * | 2006-06-17 | 2008-12-31 | 铜陵三佳科技股份有限公司 | Separation method for surface adhesive integrated circuit product and its mould |
| US7781310B2 (en) * | 2007-08-07 | 2010-08-24 | Semiconductor Components Industries, Llc | Semiconductor die singulation method |
| SG164306A1 (en) * | 2009-03-05 | 2010-09-29 | Rokko Technology Pte Ltd | Assembly and method for improved singulation |
| CN201910409U (en) * | 2010-09-21 | 2011-07-27 | 深圳市矽格半导体科技有限公司 | Multi-row trimming and forming die for integrated circuit |
| CN202219521U (en) * | 2011-08-25 | 2012-05-16 | 铜陵三佳山田科技有限公司 | Punching molding separation mould for pin-free integrated circuit |
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| CN102284977A (en) | 2011-12-21 |
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