CN113266773A - Flexible belt for COB (chip on board) flip-chip and flip-chip process thereof - Google Patents
Flexible belt for COB (chip on board) flip-chip and flip-chip process thereof Download PDFInfo
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- CN113266773A CN113266773A CN202110515188.3A CN202110515188A CN113266773A CN 113266773 A CN113266773 A CN 113266773A CN 202110515188 A CN202110515188 A CN 202110515188A CN 113266773 A CN113266773 A CN 113266773A
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- flexible
- chip
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- cob
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S4/00—Lighting devices or systems using a string or strip of light sources
- F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
- F21S4/22—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports flexible or deformable, e.g. into a curved shape
- F21S4/24—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports flexible or deformable, e.g. into a curved shape of ribbon or tape form, e.g. LED tapes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/90—Methods of manufacture
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V15/00—Protecting lighting devices from damage
- F21V15/005—Measures against vandalism, stealing or tampering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V15/00—Protecting lighting devices from damage
- F21V15/02—Cages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
- F21V17/101—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening permanently, e.g. welding, gluing or riveting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
- F21V17/107—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening using hinge joints
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V31/00—Gas-tight or water-tight arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Abstract
The invention discloses a flexible belt for COB flip-chip and a flip-chip process thereof, belonging to the field of LED lamps, which solves the problem of overlarge bending angle of a COB flexible belt produced by the flip-chip process by arranging limiting balls hinged with each other in the flexible belt, ensures the long-life work of the flexible belt, limits the excessive bending of the flexible belt by utilizing the characteristic that the rotation angle of the hinged balls is less than 90 degrees, effectively prevents the chip from being separated from a flexible circuit board, creatively adds a hydraulic material in the flexible belt body, shapes the flexible belt body by utilizing the characteristic that the hydraulic material hardens when meeting water, the lamp belt clamp is particularly suitable for being used in the situation that patterns are inconvenient to fix when spliced, the trouble of installing the lamp belt clamp firstly is omitted, the installation time is saved, the efficiency is improved, quick-drying glue is released by extruding the flexible belt body, the installation convenience is improved, and the lamp belt clamp is suitable for places where the space is narrow and inconvenient to fix.
Description
Technical Field
The invention relates to the field of LED lamps, in particular to a flexible belt for COB (chip on board) flip-chip and a flip-chip process thereof.
Background
The COB light source is a high-light-efficiency integrated surface light source technology for directly attaching an LED chip to a mirror surface metal substrate with high light reflection rate, the technology eliminates the concept of a bracket, and has no electroless plating, reflow soldering and no surface mounting process, so that the process is reduced by about one third, and the cost is also saved by one third. There are two main forms of bare chip technology: one is COB technology, and the other is Flip Chip technology. Chip On Board (COB) in which a semiconductor chip is mounted on a printed wiring board by being connected, and electrical connection between the chip and a substrate is achieved by a lead stitching method and is covered with resin to ensure reliability.
The COB flexible lamp strip is produced according to market demands, and the defects of glass neon tubes and optical fibers are overcome, so that the COB flexible lamp strip is thoroughly replaced, can be bent, folded and wound at will, and can move and stretch freely in a three-dimensional space without being broken. The decorative plate is suitable for being used in irregular places and narrow spaces, and is also suitable for randomly combining various patterns in advertisement decoration because the decorative plate can be randomly bent and wound.
Although COB flexible light area is good to use, install more troublesome, especially adopt COB flexible light area of flip-chip technology production, need be with the help of the lamp strip clamp when its piece together pattern, will install the lamp strip clamp in advance moreover, more troublesome like this, workman's error causes the angle of buckling too big during installation in addition, leads to flexible light area solder joint and copper foil separation and leads to not bright.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a flexible belt for COB (chip on Board) inversion and an inversion process thereof, which solve the problem of overlarge bending angle of a COB flexible belt produced by the inversion process by arranging limiting balls hinged with each other in the flexible belt, ensure the long-life work of the flexible belt, limit the excessive bending of the flexible belt by utilizing the characteristic that the rotating angle of the hinged balls is less than 90 degrees, effectively prevent the chip from being separated from a flexible circuit board, creatively add hydraulic materials in the flexible belt body, shape the flexible belt body by utilizing the characteristic that the hydraulic materials are hardened when meeting water, are particularly suitable for the condition that the flexible belt is inconvenient to fix when splicing patterns, save the trouble of firstly installing a lamp belt clamp, save the installation time and improve the efficiency, release quick-drying adhesive by extruding the flexible belt body, and improve the convenience of installation, is suitable for places which are inconvenient to fix and have narrow space.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
The utility model provides a COB is flexonics area for flip-chip, includes the flexonics area body, the upper surface of flexonics area body is connected with the flexible circuit board, and is connected with the chip through hot pressing connection technology on the flexible circuit board, the inside of flexonics area body is inlayed and is had the flexible pipe, and the flexible pipe intussuseption is filled with water, place the restriction ball that a plurality of equidistant settings, and the equal fixedly connected with connecting rod of the both sides lateral wall of every restriction ball, adjacent two fixedly connected with hinge ball, every on the connecting rod equal fixedly connected with easy cracked parcel membrane, and the parcel has hydraulic material in the parcel membrane, the connecting rod runs through the parcel membrane, and the inner wall fixedly connected with of flexible pipe and the membrane thorn that corresponds. The flexible band is characterized in that limiting balls hinged with each other are arranged in the flexible band to solve the problem that the bending angle of a COB flexible band produced by a flip-chip process is too large, the long-life work of the flexible band is ensured, the flexible band is limited from being excessively bent by utilizing the characteristic that the rotation angle of the hinged balls is smaller than 90 degrees, the chip is effectively prevented from being separated from a flexible circuit board, hydraulic materials are creatively added into the flexible band body, the flexible band body is shaped by utilizing the characteristic that the hydraulic materials are hardened when meeting water, the flexible band clamp is particularly suitable for being used under the condition that the patterns are inconvenient to fix when spliced, the trouble of installing the lamp band clamp firstly is omitted, the installation time is saved, the efficiency is improved, quick-drying glue is released by extruding the flexible band body, the installation convenience is improved, and the flexible band clamp is suitable for places inconvenient to fix in a narrow space.
Further, the flexible belt body is including being located its lower extreme adhesive linkage, the inner wall that the flexible belt body is located the flexible pipe both sides has all been seted up oval storage and has been glued the chamber, and oval storage is glued and has been filled with the rapid-curing cutback glue in the chamber, the intercommunication has out to glue the passageway between the lower extreme in oval storage and the adhesive linkage in chamber, compresses oval storage through the both sides of extrusion flexible belt body and glues the chamber, and the rapid-curing cutback glue is glued the chamber from oval storage and is extruded to glue and flow to the adhesive linkage in the passageway, pastes the adhesive linkage on the wall or the mounting point can realize fixedly.
Furthermore, the inner wall fixedly connected with elasticity that oval glue storage chamber is located quick-drying glue liquid level pushes away the crowded board, is in order to conveniently extrude the quick-drying glue, and elasticity pushes away the crowded board and is located the central point below that oval glue storage chamber in addition, and elasticity pushes away the crowded board and bends downwards when extruding oval glue storage chamber like this to extrude the quick-drying glue downwards, and oval glue storage chamber is located the space intussuseption that elasticity pushed away the crowded board upper portion and is filled with inert gas, is in order to further extrude the quick-drying glue easily.
Further, the adhesive linkage is the network structure of fretwork, and the adhesive linkage is fixed inlays in the inner wall of flexible band body, is more even, the area is big a little in order to let the quick-drying glue that flows from going out gluey passageway distribute to avoid glue to pile up together and reduce bonding strength, the network structure of adhesive linkage has the detention effect to the quick-drying glue moreover, can prevent that the quick-drying glue that flows from dripping subaerially rapidly.
Further, articulated ball includes the ball seat, the activity is inlayed in the ball seat has the rolling ball, and the centre of sphere of rolling ball is in the ball seat, and the turned angle between the two can be less than 90 like this to avoid the bending angle of flexible area body too big.
Furthermore, the diameter of the limiting ball is smaller than the inner diameter of the flexible pipe, and the surface of the limiting ball is a smooth surface, so that the limiting ball can move smoothly in the flexible pipe.
Furthermore, the connecting rod is of a hollow structure, so that the connecting rod is light in weight, is made of a water-resistant rigid material, is prevented from being corroded by water, and is prevented from being bent in the bending process.
Furthermore, the size of the hinge ball is one fourth of the inner diameter of the flexible pipe, and when the bending angle of the flexible belt body is large, the hinge ball can abut against the inner wall of the flexible pipe to enable the flexible belt body to be incapable of being bent any more, so that the effect of preventing the flexible belt body from being bent excessively is achieved.
Further, the upper end fixedly connected with safety cover of flexible area body is for protecting the chip, prevents that the in-process of installation, transportation is impaired, and the safety cover adopts the leaded light material, is for not influencing light.
Further, an inverted mounting process of a flexible belt for COB inverted mounting comprises the following operation steps:
s1, firstly, connecting the flexible circuit board and the flexible belt body, bonding by using non-conductive glue during connection, and pressurizing and reinforcing;
s2, connecting the chip with the flexible circuit board, and connecting the chip with the flexible circuit board by adopting a hot pressing process to connect the salient points on the chip with the salient points on the flexible circuit board;
and S3, covering the chip with a protective cover, and adhering with non-conductive adhesive.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme is through setting up the too big problem of COB flexible band bending angle that adopts the production of flip-chip technology in the flexible band of restriction ball of mutual articulated, ensure the work of flexible band long life, it utilizes the articulated ball turned angle to be less than the excessive bending of 90 characteristics to restrict the flexible band, effectively prevent breaking away from of chip and flexible circuit board, it is creative adds hydraulic material in the inside of flexible band body, utilize hydraulic material to meet the characteristics of hardening of water to finalize the design to the flexible band body, specially adapted is under the inconvenient fixed condition when the concatenation pattern, the trouble of installing the lamp band clamp earlier has been saved, installation time and raise the efficiency, it still releases the rapid-curing adhesive through extrusion flexible band body, the convenience of installation is improved, be applicable to the narrow and small inconvenient fixed place in space.
(2) The flexible tape body is including being located its lower extreme adhesive linkage, the inner wall that the flexible tape body is located the flexible tube both sides has all been seted up oval storage and has been glued the chamber, and oval storage is glued and is filled with the rapid-curing cutback glue in the chamber, the intercommunication has out gluey passageway between the lower extreme in chamber and the adhesive linkage is glued in oval storage, compress oval storage through the both sides of extrusion flexible tape body and glue the chamber, the rapid-curing cutback glue is stored up gluey chamber from oval and is extruded to flow to the adhesive linkage in gluey passageway, paste the adhesive linkage on the wall or the mounting point can realize fixedly.
(3) The inner wall fixedly connected with elasticity that oval glue storage cavity is located the rapid-curing cutback and glues the liquid level pushes away the crowded board, is in order to conveniently extrude the rapid-curing cutback glue, and elasticity pushes away the crowded board and is located the central point below that oval glue storage cavity, and elasticity pushes away the crowded board downward bending when the oval glue storage cavity of extrusion like this to extrude the rapid-curing cutback glue downwards, and the space intussuseption that oval glue storage cavity is located elasticity and pushes away the crowded board upper portion is filled with inert gas, is in order to further extrude the rapid-curing cutback glue easily.
(4) The adhesive linkage is the network structure of fretwork, and the adhesive linkage is fixed inlays in the inner wall of flexible band body, is more even, the area is big some in order to let from the rapid-curing cutback glue that goes out the gluey passageway and flow out to avoid glue to pile up together and reduce bonding strength, the network structure of adhesive linkage has the detention effect to the rapid-curing cutback glue in addition, can prevent that the rapid-curing cutback glue that flows from dripping subaerial.
(5) Articulated ball includes the ball seat, and the activity is inlayed in the ball seat has the rolling ball, and the centre of sphere of rolling ball is in the ball seat, and the turned angle between the two can be less than 90 like this to avoid the bending angle of flexible area body too big.
(6) The diameter of the limiting ball is smaller than the inner diameter of the flexible pipe, and the surface of the limiting ball is a smooth surface, so that the limiting ball can move smoothly in the flexible pipe.
(7) The connecting rod is hollow structure for realize the lightweight, and the connecting rod adopts water-fast rigid material, is in order to prevent to be corroded by water, also prevents that the in-process connecting rod of buckling from being bent.
(8) The size of hinge ball is the quarter of flexible pipe internal diameter, and when the angle of buckling of flexible area body was big, hinge ball can support the inner wall of flexible pipe and make the flexible area body can't continue to buckle to play the effect that prevents the excessive buckle of flexible area body.
(9) The upper end fixedly connected with safety cover of flexible area body is for protecting the chip, prevents that the in-process of installation, transportation is impaired, and the safety cover adopts the leaded light material, is for not influencing light.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic view of the structure of the flexible belt of the present invention in a compressed state;
FIG. 3 is a side cross-sectional structural schematic view of a flexible band of the present invention;
FIG. 4 is a schematic view of a flexible strip of the present invention in a flexed condition;
FIG. 5 is a perspective view of the articulated ball of the present invention;
FIG. 6 is a schematic cross-sectional view of an articulated ball according to the invention;
FIG. 7 is a schematic view of the hinge ball of the present invention in a different direction of bending;
FIG. 8 is a process flow diagram of the present invention.
The reference numbers in the figures illustrate:
the flexible band comprises a flexible band body 1, a bonding layer 101, a flexible circuit board 2, a chip 3, a flexible tube 4, a limiting ball 5, a connecting rod 6, a wrapping film 7, a film thorn 8, a hinge ball 9, a ball seat 901, a rotating ball 902, an oval glue storage cavity 10, an elastic push plate 1001, a glue outlet channel 11 and a protective cover 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
referring to fig. 1-8, a flexible band for COB flip-chip includes a flexible band body 1, referring to fig. 1-2, the flexible band body 1 includes an adhesive layer 101 at a lower end thereof, the adhesive layer 101 is a hollow mesh structure, and the adhesive layer 101 is fixedly embedded in an inner wall of the flexible band body 1, so as to make distribution of the quick-drying adhesive flowing out from the adhesive outlet channel 11 more uniform and larger in area, so as to prevent the adhesive from being accumulated together and reduce adhesive strength, and the mesh structure of the adhesive layer 101 has a retention effect on the quick-drying adhesive, so as to prevent the flowing quick-drying adhesive from rapidly dropping on the ground, the inner walls of the flexible band body 1 at both sides of the flexible tube 4 are both provided with an elliptical adhesive storage cavity 10, and the elliptical adhesive storage cavity 10 is filled with the quick-drying adhesive, the adhesive outlet channel 11 is communicated between a lower end of the elliptical adhesive storage cavity 10 and the adhesive layer 101, the elliptical adhesive storage cavity 10 is compressed by extruding both sides of the flexible band body 1, quick-drying glue is extruded from the oval glue storage cavity 10 into the glue outlet channel 11 and flows onto the adhesive layer 101, the adhesive layer 101 is attached to a wall or is fixed at a mounting point, the inner wall of the oval glue storage cavity 10, which is positioned on the liquid level of the quick-drying glue, is fixedly connected with an elastic pushing plate 1001 for facilitating the extrusion of the quick-drying glue, and the elastic pushing plate 1001 is positioned below the central point of the oval glue storage cavity 10, so that the elastic pushing plate 1001 is bent downwards when the oval glue storage cavity 10 is extruded, the quick-drying glue is extruded downwards, and inert gas is filled in the space of the oval glue storage cavity 10, which is positioned at the upper part of the elastic pushing plate 1001, so as to further facilitate the extrusion of the quick-drying glue;
referring to fig. 1, a protective cover 12 is fixedly connected to an upper end of a flexible band body 1 to protect a chip 3 from being damaged during installation and transportation, the protective cover 12 is made of a light guide material so as not to affect light, a flexible circuit board 2 is connected to an upper surface of the flexible band body 1, and the chip 3 is connected to the flexible circuit board 2 through a hot press connection process, referring to fig. 3-4, a flexible tube 4 is embedded inside the flexible band body 1, water is filled in the flexible tube 4, a plurality of limiting balls 5 are arranged in the flexible tube 4 at equal intervals, a diameter of the limiting ball 5 is smaller than an inner diameter of the flexible tube 4, a surface of the limiting ball 5 is a smooth surface, so that the limiting ball 5 can move smoothly inside the flexible tube 4, a distance between two limiting balls 5 of the bent flexible band body 1 is slightly changed, and therefore the limiting ball 5 can move, in order to enable the limiting balls 5 to move, the surfaces of the limiting balls 5 are smooth surfaces, the outer side walls of two sides of each limiting ball 5 are fixedly connected with connecting rods 6, the connecting rods 6 are of hollow structures and are used for realizing light weight, the connecting rods 6 are made of waterproof rigid materials and are used for preventing the connecting rods 6 from being corroded by water and preventing the connecting rods 6 from being bent in the bending process;
referring to fig. 5-7, a hinge ball 9 is fixedly connected between two adjacent connecting rods 6, the size of the hinge ball 9 is one fourth of the inner diameter of the flexible tube 4, when the bending angle of the flexible band body 1 is large, the hinge ball 9 will abut against the inner wall of the flexible tube 4 to prevent the flexible band body 1 from being bent any more, so as to prevent the flexible band body 1 from being bent excessively, the hinge ball 9 includes a ball seat 901, a rotating ball 902 is movably embedded in the ball seat 901, the center of the rotating ball 902 is located in the ball seat 901, so that the rotating angle between the two is smaller than 90 °, so as to prevent the flexible band body 1 from being bent excessively large, each connecting rod 6 is fixedly connected with a breakable wrapping film 7 (the wrapping film 7 may be a plastic film, or other materials may be selected according to actual requirements), and the wrapping film 7 is wrapped with a hydraulic material, which may be a foamed elastic polyurethane resin material preferentially, other materials capable of being quickly hardened can be selected according to actual needs, the connecting rod 6 penetrates through the wrapping film 7, and the inner wall of the flexible pipe 4 is fixedly connected with the film pricks 8 corresponding to the wrapping film 7.
Referring to fig. 8, the flip-chip process of the flexible tape body 1 includes the following steps:
s1, firstly, the flexible circuit board 2 and the flexible belt body 1 are connected, and are bonded by non-conductive glue and are reinforced by pressurization;
s2, connecting the chip 3 and the flexible circuit board 2, and connecting the bumps on the chip 3 and the bumps on the flexible circuit board 2 by adopting a hot-pressing process;
s3, cover the protection cover 12 on the outside of the chip 3, and bond with a non-conductive adhesive.
The structural working principle of the scheme is as follows: when the flexible belt body 1 is installed, if patterns need to be spliced, the flexible belt body 1 is firstly pinched to enable the membrane thorn 8 to pierce the wrapping membrane 7 to release an internal hydraulic material, then the flexible belt body 1 is quickly bent into a corresponding radian along the outline of the patterns, the hydraulic material is loosened after being hardened and shaped, the two sides of the flexible belt body 1 are pinched to enable the oval glue storage cavity 10 to be compressed when the patterns need to be fixed, the elastic extrusion plate 1001 is bent downwards to extrude quick-drying glue, the quick-drying glue flows onto the adhesive layer 101 through the glue outlet channel 11, and finally the adhesive layer 101 is attached to a fixed point and is pressed and kept static for several seconds.
The problem that the bending angle of a COB flexible belt produced by adopting a flip-chip process is too large is solved by arranging the limiting balls 5 which are hinged with each other in the flexible belt, the long-life work of the flexible belt is ensured, the excessive bending of the flexible belt is limited by utilizing the characteristic that the rotating angle of the hinged balls 9 is smaller than 90 degrees, the separation of the chip 3 and the flexible circuit board 2 is effectively prevented, hydraulic materials are creatively added into the flexible belt body 1, the flexible belt body 1 is shaped by utilizing the characteristic that the hydraulic materials are hardened when meeting water, the flexible belt is particularly suitable for the condition that the patterns are inconvenient to fix when spliced, the trouble of firstly installing a lamp belt clamp is saved, the installation time is saved, the efficiency is improved, quick-drying adhesive is released by extruding the flexible belt body 1, the installation convenience is improved, and the flexible belt is suitable for places which are inconvenient to fix in a narrow space.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.
Claims (10)
1. The utility model provides a COB is flexonics area for flip-chip, includes flexonics area body (1), the upper surface of flexonics area body (1) is connected with flexible circuit board (2), and is connected with chip (3), its characterized in that through hot pressing connection technology on flexible circuit board (2): the inside of flexible band body (1) is inlayed and is had flexible tube (4), and flexible tube (4) intussuseption is filled with water, place restriction ball (5) that a plurality of equidistant settings in flexible tube (4), and the equal fixedly connected with connecting rod (6) of the both sides lateral wall of every restriction ball (5), adjacent two fixedly connected with hinge ball (9), every on connecting rod (6) equal fixedly connected with easily cracked wrapping film (7), and the wrapping has hydraulic material in wrapping film (7), wrapping film (7) is run through in connecting rod (6), and the inner wall fixedly connected with of flexible tube (4) and corresponding membrane thorn (8) of wrapping film (7).
2. The COB flip-chip flexible belt of claim 1, characterized in that: the flexible belt body (1) is including being located adhesive linkage (101) of its lower extreme, the inner wall that flexible belt body (1) is located flexible pipe (4) both sides has all been seted up oval storage and has been glued chamber (10), and oval storage has filled the rapid-curing cutback glue in gluing chamber (10), the intercommunication has out gluey passageway (11) between lower extreme and adhesive linkage (101) in oval storage and gluing chamber (10).
3. The COB flip-chip flexible belt of claim 2, characterized in that: the inner wall of the oval glue storage cavity (10) on the surface of the quick-drying glue is fixedly connected with an elastic pushing plate (1001), and inert gas is filled in the space of the oval glue storage cavity (10) on the upper part of the elastic pushing plate (1001).
4. The COB flip-chip flexible belt of claim 2, characterized in that: the bonding layer (101) is of a hollowed-out net structure, and the bonding layer (101) is fixedly embedded in the inner wall of the flexible belt body (1).
5. The COB flip-chip flexible belt of claim 1, characterized in that: the articulated ball (9) comprises a ball seat (901), and a rotating ball (902) is movably embedded in the ball seat (901).
6. The COB flip-chip flexible belt of claim 1, characterized in that: the diameter of the limiting ball (5) is smaller than the inner diameter of the flexible pipe (4), and the surface of the limiting ball (5) is a smooth surface.
7. The COB flip-chip flexible belt of claim 1, characterized in that: the connecting rod (6) is of a hollow structure, and the connecting rod (6) is made of a water-resistant rigid material.
8. The COB flip-chip flexible belt of claim 1, characterized in that: the size of the hinge ball (9) is one fourth of the inner diameter of the flexible pipe (4).
9. The COB flip-chip flexible belt of claim 1, characterized in that: the upper end fixedly connected with safety cover (12) of flexible area body (1), and safety cover (12) adopt leaded light material.
10. The flip-chip process of a flexible tape for COB flip-chip according to any one of claims 1 to 9, wherein: the method comprises the following operation steps:
s1, firstly, connecting the flexible circuit board (2) and the flexible belt body (1), bonding by using non-conductive glue during connection, and pressurizing and reinforcing;
s2, connecting the chip (3) with the flexible circuit board (2), and connecting the bumps on the chip (3) and the bumps on the flexible circuit board (2) by adopting a hot-pressing process;
and S3, finally, covering the protective cover (12) outside the chip (3) and bonding the protective cover with non-conductive glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110515188.3A CN113266773A (en) | 2021-05-12 | 2021-05-12 | Flexible belt for COB (chip on board) flip-chip and flip-chip process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110515188.3A CN113266773A (en) | 2021-05-12 | 2021-05-12 | Flexible belt for COB (chip on board) flip-chip and flip-chip process thereof |
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Application publication date: 20210817 |