KR100712509B1 - Assembling method and structure of image sensor packages - Google Patents

Abstract

Provided are a method for assembling image sensor packages and a package structure assembled by the same. According to an aspect of the present invention, a method of assembling an image sensor package includes a substrate having a plurality of image sensors mounted thereon and an internal cavity having an aperture corresponding to an upper surface of the image sensor to wrap around the image sensor. A plurality of housings provide an interconnecting housing strip, a transparent cover plate for the windows that seal the opening and attach them sequentially. The transparent cover plate, housing strip, and substrate are sequentially cut and separated into individual image sensor packages. A barrel having an opening aligned with the opening of the housing is assembled on the housing. The lens unit is inserted into the opening of the barrel, and the contact surface of the barrel and the contact surface of the lens unit are adhered to assemble the image sensor package to which the lens is attached.

Image Sensors, Packages, Lenses, Singulation, Strips

Description

Assembling method and structure of image sensor packages

1A and 1B are schematic perspective views and cross-sectional views illustrating a substrate state in which a plurality of image sensor packages are arranged, according to an exemplary embodiment of the present invention.

2A and 2B are schematic perspective and cross-sectional views, respectively, for explaining a housing strip for an image sensor package according to an embodiment of the present invention.

3 is a perspective view and a cross-sectional view schematically showing a cover plate for the window of the image sensor package according to an embodiment of the present invention.

4A and 4B are perspective views and cross-sectional views schematically illustrating a process of assembling a housing strip and a cover plate on a substrate on which a plurality of image sensors are arranged, according to an embodiment of the present invention.

5A and 5B are cross-sectional views schematically illustrating a process of separating into individual image sensor packages according to an embodiment of the present invention, respectively.

6A and 6B are schematic cross-sectional views illustrating examples of separate individual image sensor packages according to an embodiment of the present invention.

7A and 7B are cross-sectional views schematically illustrating a process of assembling a lens unit to a separate image sensor package according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view schematically illustrating a barrel strip for an image sensor package having a lens unit according to an exemplary embodiment of the present invention.

FIG. 9 is a cross-sectional view schematically illustrating a process of preparing an image sensor package assembly to which a barrel strip is assembled according to an embodiment of the present invention.

10 is a schematic cross-sectional view for explaining a process of assembling a barrel strip to an image sensor package assembly according to an embodiment of the present invention.

FIG. 11 is a cross-sectional view schematically illustrating a process of separately separating an image sensor package having a barrel according to an embodiment of the present invention.

12 is a cross-sectional view schematically illustrating an image sensor package having a barrel according to an embodiment of the present invention.

13 to 16 are schematic views for explaining a process of assembling separate separate windows in a housing strip according to another embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the packaging of electronic components, and more particularly, to a method for assembling an image sensor package and a package structure assembled thereby.

Image sensors are semiconductor electronic devices that convert optical information into electrical signals. The image sensor is generally presented as a charge coupled device image sensor and a CMOS image sensor. The package is configured to protect this image sensor and to allow light to enter the light receiving surface or active surface of the image sensor.

The package for such an image sensor is configured with at least a housing and a window into which light is incident on the light receiving or active surface of the image sensor. In addition, such a package may further comprise a lens aligned with the active surface of the image sensor. In this case, a lens holder for supporting the lens may be introduced to be included in the package, and a housing having an aperture may be introduced into the package so that the lens holder is fitted.

Such an image sensor package having a lens and a lens holder may be illustrated as shown in US Pat. No. 6,483,101 B1 (registered Nov. 19, 2002, "Molded Image Sensor Package Having Lens Holder") by Webster. Can be. The image sensor package presented in US Pat. No. 6,483,101 B1 has a thread on the outer wall of the lens holder, an opening in the housing for insertion of the lens holder, a thread on the inner wall of the opening and a lens holder on the housing. It can be understood to be screwed into the opening of the form.

By the way, when the lens holder is inserted into the opening of the housing in the image sensor package of this type, it is expected that the friction between the thread and the thread will be accompanied by the insertion of the lens holder. Therefore, due to the friction between the threads may cause the generation of particles (fatal) fatal to the image sensing (image sensing) process. In addition, individual windows machined to the housing are provided on the housing, which is expected to require considerable effort and cost to machine the window in such a shape. Further, in the process of inserting the lens holder into the opening of the housing, friction between the threads is involved, whereby it is expected that the degree to which the lens holder is inserted into the opening will be difficult to control uniformly every time. Therefore, it is expected that a final process of adjusting the focus of the lens for optical alignment will be accompanied separately.

Therefore, the development of an image sensor package that can further prevent the generation of particles during assembly is required. In addition, there is a need to develop an image sensor package that can simultaneously assemble multiple image sensors at one time, thereby reducing the costs associated with individual image sensor packages.

An object of the present invention is to provide an image sensor package assembling method and a package structure according to the present invention, which can further prevent generation of particles during assembly and simultaneously assemble a plurality of image sensors at once.

According to an aspect of the present invention, a plurality of image sensors may be provided with a substrate on which the plurality of image sensors are mounted, and having an aperture corresponding to an upper surface of the image sensor to surround the image sensor. Providing a housing strip interconnected in correspondence with the array of image sensors, the housing having a shape having a cavity, wherein the housing strip is attached to the substrate and the image of the housing strip is attached to the housing strip. Attaching a transparent cover plate to seal the opening to the image sensor package, and sequentially cutting the transparent cover plate, the housing strip, and the substrate into individual image sensor packages. Present assembly method.

Here, the separating may include cutting the cover plate and cutting the housing strip portion and the substrate exposed by cutting the cover plate.

In this case, the cutting steps may be performed such that the cut surface of the cover plate is positioned inside the cut surface of the housing strip portion and the substrate.

Alternatively, the cutting steps may be performed such that the cut surface of the cover plate is on the same plane as the cut surface of the housing strip portion and the substrate.

The cover plate may be cut and separated from the cover plate to be mounted on the housing strip to cover the opening.

In another aspect of the present invention, there is provided a substrate having a plurality of image sensors mounted thereon, the internal cavity having an aperture corresponding to an upper surface of the image sensor to wrap around the image sensor. Providing a housing strip interconnected to correspond to the arrangement of the image sensors, the housing having a plurality of housings, the bottom surface of the housing strip being attached to the substrate and the opening formed on the top surface of the housing strip. Attaching a transparent cover plate for sealing windows, sequentially cutting the transparent cover plate and the housing strip, and the substrate into individual image sensor packages, to the separated image sensor package Assembling a barrel having an opening aligned with the opening of the housing; Inserting into the lens unit areas, and presents the image sensor package assembly comprises the step of adhering the contacting surface portion and the inlet portion of the lens barrel.

According to another aspect of the present invention, there is provided a substrate having a plurality of image sensors mounted thereon, the shape having an internal cavity having an aperture corresponding to an upper surface of the image sensor and surrounding the image sensor. Providing a housing strip interconnected in a plurality of housings corresponding to the array of image sensors, attaching a bottom surface of the housing strip to the substrate, respectively attaching windows covering the opening. Cutting, separating the housing strip and the substrate into individual image sensor packages, assembling a barrel having an opening aligned with the opening of the housing in the separated image sensor package, and into the opening of the barrel. An image sensor package assembly method comprising inserting and attaching a lens unit is provided. The.

In another aspect of the present invention, there is provided a substrate having a plurality of image sensors mounted thereon, the internal cavity having an aperture corresponding to an upper surface of the image sensor to wrap around the image sensor. Providing a housing strip interconnected to correspond to the array of image sensors, the housing having a plurality of housings, the bottom surface of the housing strip being attached to the substrate and the opening formed on the top surface of the housing strip. Attaching a sealing transparent cover plate; providing a barrel strip in which a plurality of barrels into which a lens portion to be aligned with an opening of the housing is inserted are interconnected; and a portion of the cover plate is removed using a first blade. Cutting to separate the openings of the individual housings into a plurality of windows, the barrel strip Attaching a lower surface to the upper surface of the housing strip exposed by the window, and aligning the second blade having a narrower width than the first blade to the connecting portion of the barrel strip to the connecting portion and the substrate below A method of assembling an image sensor package comprising cutting and separating into individual image sensor packages having a barrel for the lens portion.

Here, the preparing of the barrel strip may include injection molding the cylinder-shaped barrels having a smooth inner surface of the opening of the barrel and the transparent cover plate perpendicular to the surface of the barrel.

Attaching the barrel strip may be performed using an adhesive on the contact surface of the barrel strip and the housing strip or the contact surface of the barrel strip and the window.

In another aspect of the present invention, there is provided a substrate having a plurality of image sensors mounted thereon, the internal cavity having an aperture corresponding to an upper surface of the image sensor to wrap around the image sensor. Providing a housing strip interconnected to correspond to the array of image sensors, the housing having a plurality of housings, the bottom surface of the housing strip being attached to the substrate and the opening formed on the top surface of the housing strip. Attaching a sealing transparent cover plate, providing a barrel strip interconnected by a plurality of barrels into which a lens portion to be aligned in the opening of the housing is inserted, and aligning and attaching the barrel strip to the transparent cover plate. And cutting along the connecting portion of the barrel strip to apply a barrel for the lens portion. It proposes an image sensor package assembly comprises the step of separation into individual image sensor package.

In addition, another aspect of the present invention, the housing of the shape having an interior cavity (cavity) to wrap around the image sensor having a substrate (aperture) corresponding to the image sensor mounted on the substrate, the image sensor mounted on the substrate; forming a structure comprising a window attached to the opening to seal the opening, assembling a barrel having an opening aligned with the opening of the housing of the structure, into the opening of the barrel; It provides a method of assembling the image sensor package including the step of inserting the lens unit, and the contact surface of the lens unit and the inlet portion of the barrel.

The forming of the structure may include forming the window so that the window exposes the upper surface of the housing, and the barrel may be attached to the upper surface of the housing in which the lower surface is exposed and attached by an adhesive. .

Providing the substrate in such methods may include stacking another integrated circuit chip between the image sensor and the substrate.

In addition, preparing the housing strip may include molding the housing strip by injection molding.

Attaching the housing strip to the substrate may attach the lower surface of the housing strip to the area surface between the image sensors of the substrate using adhesive.

In this case, applying a semi-solid adhesive to the contact surface of the substrate and the transparent cover plate of the housing strip, and heat-pressing the transparent cover plate and the substrate against the housing strip to cure the adhesive It may include the step of attaching. This curing step may involve vacuum pumping.

The separating may include performing cutting by aligning the blade in the middle of the connection between the housings of the housing strip.

The separating may include cutting a portion of the cover plate using a first blade to separate the plurality of windows sealing the openings of the respective housings, and connecting portions of the housing strip exposed by the windows. It may be performed by cutting and separating the substrate from the connection portion and the lower portion by using a second blade having a narrower width than the first blade.

The barrel may be assembled perpendicularly to the surface of the transparent cover plate in the form of a cylinder having a smooth inner surface of the opening.

The inserting of the lens unit may include preparing a lens to be inserted into the barrel, arranging a spacer spaced apart from the lens and the cover plate at a predetermined interval beneath the lens, on the lens. Arranging an aperture that shields a portion of an edge, inserting the aligned spacer, the lens, and the aperture into the barrel, and fastening a contact portion between the aperture and an inner surface of the barrel with an adhesive. It may be performed including.

At this time, the step of attaching the spacer, the lens and the aperture to each other with an adhesive may be further performed. The inserting the lens unit may further include aligning a second spacer to the lens, and aligning a second lens on the second spacer.

According to another aspect of the present invention, a housing having a shape having an internal cavity to wrap around the image sensor with an aperture corresponding to a substrate, an image sensor mounted on the substrate, and an upper surface of the image sensor An image sensor comprising a structure including a window attached to seal the opening on the housing, a barrel assembled to align with the opening of the housing, and a lens portion inserted into the opening of the barrel. Present the package.

The barrel may be formed in a cylindrical shape in which the inner surface of the opening is smooth and the transparent cover plate is perpendicular to the surface.

The lens unit includes a lens to be inserted into the barrel, a spacer arranged under the lens so as to be spaced apart from each other at a predetermined interval, and an aperture shaded to shade a portion of the edge portion of the lens on the lens. It may be configured to include. The lens unit may further include a second spacer aligned on the lens, and a second lens aligned on the second spacer.

According to the present invention, it is possible to further prevent generation of particles during assembly, and to provide an image sensor package assembly method and a package according to which multiple image sensors can be assembled at the same time.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, embodiments of the present invention may be modified in many different forms, and the scope of the present invention should not be construed as being limited by the embodiments described below. Embodiments of the invention are preferably to be interpreted as being provided to those skilled in the art to more fully describe the invention.

Embodiments of the present invention present an image sensor package attached to a substrate, a housing having an opening introduced therein to protect the image sensor, an image sensor package including a window covering the opening, and a method of assembly thereof. Also disclosed is an image sensor comprising a window and / or a body tube attached on a housing and a method of assembly thereof. In addition, a lens unit sliding to the barrel is provided, including a lens and spacers for maintaining and controlling the distance between the lens and the active surface of the image sensor and the distance between the lenses.

In the embodiments of the present invention, when assembling the image sensor package, assembling the housing, assembling the window, and / or assembling the barrel with the plurality of image sensors attached to and aligned with the substrate is performed. In addition, the process of inserting the lens unit into the barrel may also be performed in a state where a plurality of image sensors are attached and aligned to the substrate. Attaching a plurality of image sensors on a substrate and forming a bonding wire, that is, in a form in which the plurality of image sensors are arranged on the substrate, processes for assembling components such as packaging processes or other barrels may be performed. Can be.

In order to simultaneously package a plurality of image sensors, a housing for an individual image sensor is presented in a form in which a plurality of housings are connected to each other, that is, a strip of housings and used for housing assembly.

In addition, the window of the IR filter glass is not used in a separately processed form for the individual image sensor, and the window as a large glass plate is attached and assembled on the housing strip so that a plurality of image sensors arranged on the substrate can all be covered. After opening, separate and cut off the bar. Alternatively, the window of the IR filter glass may be attached and assembled in a separately processed form.

In addition, when assembling the barrel, a plurality of barrels corresponding to individual image sensors are formed in an interconnected form, i.e., strips of barrels are attached to the window or / and the housing, and then cut and separated individually.

In addition, the lens unit on the window is attached by sliding the lens unit to which the lens and the spacer are attached to each other into the barrel in which the barrel strip is assembled or / and the barrel strip is cut separately.

1A and 1B are schematic perspective views and cross-sectional views illustrating a substrate state in which a plurality of image sensor packages are arranged, according to an exemplary embodiment of the present invention.

1A and 1B, an image sensor package according to an exemplary embodiment of the present invention includes a structure in which a plurality of image sensors 200 are arranged on the substrate 100 so that the active surface 201 is arranged upward. The image sensors 200 arranged may be, for example, CMOS image sensors, CCD image sensors, or CMOS image sensors incorporating pyroelectric ceramics on CMOS devices.

The substrate 100 may be an image such as a printed circuit board (PCB), an alumina-based ceramic substrate, a plastic glass laminated substrate, a tape based substrate, or a flexible PCB. It can be a substrate as a chip carrier that can be used in the sensor package. The back of the substrate 100 may be provided with a connection terminal 105 to be electrically connected to another FPCB or a socket (socket).

A plurality of such image sensors 200 are attached to the substrate 100 in an array. Although not shown, an adhesive layer may be introduced between the individual image sensors 200 and the substrate 100 for such attachment. In addition, the image sensor 200 may be electrically connected to the external substrate 100 by a bonding wire 103 bonded to an interconnection pad 101 provided on the substrate 100. Nevertheless, the introduction of such an adhesive layer or the formation of the bonding wire 103 may be modified by various methods of electronic component packaging.

With a plurality of image sensors 200 aligned on the substrate 100 without sawing and / or singulating the substrate 100 with the individual image sensors 200, Subsequent package assembly procedures are performed. Subsequent package assembly processes may include assembling the housing and assembling the window, and / or assembling the barrel and assembling the lens unit. The substrates 100 may be assembled with a plurality of image sensors 200 arranged therein. The processes are carried out.

2A and 2B are schematic perspective and cross-sectional views, respectively, for explaining a housing strip for an image sensor package according to an embodiment of the present invention.

2A and 2B, when assembling the housing 310 that protects the image sensor 200, individual housings 310 corresponding to each of the plurality of image sensors 200 are formed on the substrate 100. A connected housing strip 300 is used. By assembling and attaching the housing strip 300 to which the respective housings 310 are interconnected, the plurality of housings 310 are placed on the substrate 100 around each of the individual image sensors 200 at once. Are attached and assembled simultaneously.

The housing strip 300 is molded by injection molding or the like in a shape in which the individual housings 310 are connected to each other. Thus, this housing strip 300 contacts the portion of the substrate 100 between the image sensors 200 such that the individual housing 310 surrounds the individual image sensor 200 attached on the substrate 100. It is shaped to be attached. In this case, each housing 310 is formed to have an opening 311 at a position corresponding to the active surface 201 of the image sensor 200.

The individual housings 310 are shaped like rims surrounding the image sensor 200, and the housing strip 300 is shaped such that these rims are connected to each other. In this case, the cavity 310 is spaced apart from the housing 310 and the image sensor 200 to form a cavity formed inside the housing 310. Accordingly, the image sensor package according to the embodiment of the present invention is formed to be substantially an air cavity shaped package. In this case, the height of the housing 310 is higher than that of the image sensor 200, so that the loop height of the bonding wire 103 is lower than the height of the housing 310.

When forming the housing strip 300, a molding method by injection molding may be used, and the housing strip 300 may be formed of a plastic or ceramic material which is advantageous for such injection molding. As such, the housing strip 300 to which the plurality of housings 310 are connected is prepared first for housing assembly. Since the housing strip 300 is a connection of the housings 310 having a cavity 312 therein and having an opening 311 as shown in the cross-sectional view of FIG. 2B, the shape of the housing strip 300 is very simple. molding) can also be easily formed by injection molding.

3 is a perspective view schematically illustrating a cover plate for a window of an image sensor package according to an embodiment of the present invention.

Referring to FIG. 3, light is incident on the active surface 201 of the image sensor 200 of FIG. 1A through an opening 311 of the housing, but is located inside the housing 310 of FIG. 2A. In order to seal 200 from the outside, a window of the image sensor package is introduced. In an embodiment of the invention the window is assembled to the housing strip 300 by attaching a cover plate 400 in the form of a large glass plate to the housing strip 300. Thus, instead of assembling separately to the individual image sensors, they are assembled to the housing strip 300 so as to seal the openings 311 of the plurality of housings 310 at once in a large plate shape.

In an image sensor package, these windows are introduced into a glass plate which mainly acts as an IR filter. Thus, the cover plate 400 of FIG. 3 may be introduced into the infrared filtering glass plate. The cover plate 400 is introduced into a plate wide enough to cover the entire substrate 100 of FIG. 1A.

The substrate 100, the housing strip 300, and the cover plate 400, on which the image sensors 200 are prepared, are arranged so that the respective housings 310 are aligned with the individual image sensors 200, respectively. Attach. At this time, the upper surface 303 of the housing strip 300 is in contact with the cover plate 400 and the lower surface 304 is in contact with the substrate 100, so that the housing strip 300 supports the cover plate 400. .

4A and 4B are perspective views and cross-sectional views schematically illustrating a process of assembling a housing strip and a cover plate on a substrate on which a plurality of image sensors are arranged, according to an embodiment of the present invention.

4A and 4B, the housing strip 300 and the cover plate 400 are sequentially assembled to the substrate 100 on which the image sensors 200 are arranged.

4A and 4B, the substrate 100, the housing strip 300, and / or the cover plate 400 are assembled to each other using an adhesive or the like. For example, as shown in FIG. 4B, a first adhesive layer 510 is formed on the bottom surface 304 to contact the substrate 100 of the housing strip 300, and the housing strip 300 is formed on the substrate 100. Glue and assemble. Since the lower surface 304 of the housing strip 300 corresponds to the portion of the substrate 100 exposed between the image sensors 200, the first adhesive layer 510 applied to the lower surface 304 may be exposed to the exposed substrate 100. ) And the bottom surface 304 are bonded and sealed.

In this case, the first adhesive layer 510 may be formed of an adhesive such as an epoxy resin. At this time, the epoxy resin is preferably adhered to the bottom surface 304 of the semi-solid state or the gel state (B-stage) rather than the A state (A-stage) of the liquid state. In general, epoxy resins are known to be transformed into a B state by curing at an appropriate temperature in the A state (A-stage), which is a liquid state, and in a solid state C state by curing at an appropriate temperature in the B state ( C-stage).

Since the first adhesive layer 510 is formed of an epoxy resin in a B state, it is easier to handle the housing strip 300 in a state where the first adhesive layer 510 is bonded than when the liquid adhesive is introduced. With the housing strip 300 and the substrate 100 attached by the semi-solid first adhesive layer 510, the first adhesive layer 510 is solidified by simply curing the first adhesive layer 510 to solidify the housing strip. The 300 and the substrate 100 may be adhered in a tightly adhered state.

A second adhesive layer 520 may also be formed on the top surface 303 of the housing strip 300 for assembly with the cover plate 400. The second adhesive layer 520 may also be formed of an epoxy resin-based adhesive, and may also be formed in a B state. Subsequently, the first adhesive layer 510 and / or the second adhesive layer 520 may be cured to solidify.

At this time, the curing for solidifying the adhesive layers 510 and 520 may be performed by maintaining a vacuum state, for example, by performing vacuum pumping and thermally pressing. This allows the discharge of cold air or gas or the like into the cavity 312 in the individual housing 310 of the housing strip 300 so that air or gas or the like trapped in the cavity 312 in the subsequent thermal processes expands during the thermal process. This is to prevent a defect such as bursting in the image sensor package.

In this way, the substrate 100, the housing strip 300, and the cover plate 400 are attached to the image sensors 200 arranged on the substrate 100, respectively, the housing 310, the cover plate 400, and the substrate. An assembly of image sensor packages assembled to be sealed by 100 is formed.

5A and 5B are cross-sectional views schematically illustrating a process of separating into individual image sensor packages according to an embodiment of the present invention, respectively.

5A and 5B, the actual image sensor package may be primarily completed as an assembly or assembly 600 of the image sensor package assembled through the attaching process, but such an assembly 600 may be bladed. It can be cut into separate image sensor packages by cutting or sawing, etc. This separation process may be performed by a step cutting process including a plurality of cutting processes or a single cutting process performed by a single cutting process.

For example, as illustrated in FIG. 5A, a process of cutting the cover plate 400 to include the window 401 for each image sensor 200 may be performed by using the first blade 610. In this case, the first blade 610 may cut and remove portions of the cover plate 400 between the individual windows 401 such that the distance between the individual windows 401 is relatively wide. By removing the portion of the cover plate 400 between the windows 401, a portion of the upper surface 303 of the housing strip 300 attached to the cover plate 400 is exposed.

Subsequently, as shown in FIG. 5B, the second housing 310 is cut by using a second second blade 620 to cut off the center portion of the upper surface 303 of the housing strip 300 exposed separately for each image sensor 200. It is separated to be provided for each individual image sensor 200. At this time, the cutting operation of the second blade 620 is cut to the lower substrate 100 to separate the substrate 100 for each image sensor 200.

At this time, the interval between the windows 401 removed in the first cutting step using the first blade 610 is wider than the width cut by the second blade 620, the upper surface 303 of the separated housing 310 May be part of the window 401 to be exposed. That is, the first blade 610 for cutting in the sawing step is wider than the second blade 620, thereby inducing the window 401 and the housing 310 supporting the step to be stepped or stepped. . This is because when the barrel or / and the lens portion is introduced above the window 401, the step shape may provide an alignment criterion for the barrel or / and the lens portion to be aligned.

As such, the individual image sensor packages are separated from the assembly assembly 600 using cutting processes such as sawing or singulation. As such, the cutting process may be introduced into a batch cutting process, thereby increasing process efficiency and reducing process cost.

6A and 6B are schematic cross-sectional views illustrating examples of separate individual image sensor packages according to an embodiment of the present invention.

Referring to FIG. 6A, the individual image sensor package 601 is separated from the assembly assembly 600 as described with reference to FIGS. 5A and 5B. In this image sensor package 601, as shown in FIG. 6A, an image sensor 200 is positioned on a substrate 100 as a chip carrier, and a housing 310 forming a cavity 312 on the substrate 100. ) Is wrapped around the image sensor 200 in the form of a rim and attached to the substrate 100, and a window 401 is attached to the upper surface 303 of the housing 310 to cover and seal the opening 311 of the housing 310. It is supported by the housing 310.

The method of assembling the image sensor package according to the embodiment of the present invention as described above with reference to FIGS. 1A to 5B is similarly applied to the package of the dual chip structure as shown in FIG. 6B as well as the single chip structure as shown in FIG. 6A. Can be applied. The package of the dual chip structure as shown in FIG. 6B is different from the package of the single chip structure as shown in FIG. 6A in that only at least two chips 200 and 210 are stacked.

A digital signal processor (DSP) 210 is attached to the substrate 100 to form a bonding wire 104, and the image sensor 200 is attached to the DSP 210 using the chip adhesive layer 250. In one state, the housing strip 300 and the cover plate 400 may be attached and separated by cutting or the like to produce an image sensor package as shown in FIG. 6B.

The image sensor packages 601 and 602 as shown in FIGS. 6A and 6B are mounted as components on other PCBs or FPCBs and electrically connected through connection terminals 105 to form electronic products such as cameras. can do.

Meanwhile, embodiments of the present invention as described above may be used to fabricate the image sensor packages 601 and 602 as shown in FIGS. 6A and 6B, but the lens portion may be formed on a window, which is a more advanced infrared filter. It may also be applied to fabricate image sensor packages that are aligned and introduced.

7A and 7B are cross-sectional views schematically illustrating a process of assembling a lens unit to a separate image sensor package according to an embodiment of the present invention.

Referring to FIGS. 7A and 7B in conjunction with FIG. 6A, a barrel 810 is attached onto an image sensor package 601 as shown in FIG. 6. The barrel 810 is attached on the housing 310 by an adhesive layer (not shown) introduced at the contact surface with the exposed top surface 303 of the housing 310 of the image sensor package 601 of the barrel 810. . In addition, the adhesive layer may be introduced to the contact portion between the barrel 810 and the window 401 to attach the barrel 810 to the window 401. An epoxy-based adhesive may be used to attach the barrel 810 to the housing 310 or / and the window 401. Such an adhesive is preferably an adhesive material capable of undergoing a curing reaction by specific light such as ultraviolet rays.

Meanwhile, in the image sensor package 601 of FIG. 6A, the upper surface 303 and the window 401 of the housing 310 are formed to be stepped by the cutting method according to the multi-step cutting as described with reference to FIGS. 5A and 5B. Can be. This stepped shape can serve as an alignment key when the barrel 810 is aligned on the housing 310.

The barrel 810 is formed to have an opening 811 aligned with the active surface 201 of the image sensor 200, and may be formed of a moldable material such as plastic. Although FIG. 7A illustrates the case where the barrel 810 is assembled to the image sensor package 601 in a separate state, the barrel 810 may also be assembled on the housing strip 300 in the form of a strip.

The lens unit 700 to be inserted into the opening 811 of the barrel 810 is assembled. The lens unit 700 may include a plurality of lenses 710 and 715 as necessary, and a spacer to be introduced between the lenses 710 and 715 or between the lens 710 and the window 401. and (spacer: 730, 735). That is, the first lens 710 is aligned on the first spacer 730, the second spacer 735 is aligned on the first lens 710, and the second lens 730 is aligned thereon. In addition, the lens entrance member 737 may be aligned on the second lens 730.

This aligned lens portion 700 is slid into the opening 811 of the barrel 810 to be inserted. The parts constituting the lens unit 700 are all formed to have a diameter enough to be inserted into the opening 811 of the barrel 810, and the inside of the barrel 810 has a smooth sidewall surface. (700) The slide is inserted into the barrel 810. The insertion process of the lens unit 700 may be performed without contamination by treating the lens unit 700 using a vacuum adsorber or the like.

Meanwhile, the parts constituting the lens unit 700 may be sequentially inserted into the barrel 810, but the parts constituting the lens unit 700 are attached to each other in advance by using an adhesive or the like. ) Can be inserted into. For example, by introducing an adhesive into the contact surfaces of the spacers 730 and 735 and the lenses 710 and 715, they may be adhered to each other.

The spacers 730 and 735 of the lens unit 700 are separated from each other by the distance between the lenses 710 and 715 and the active surface 201 when the lens unit 700 is assembled on the image sensor package 601. It keeps as much as preset in focus. That is, the thickness of the first spacer 730 is set to maintain a predetermined separation distance between the first lens 710 and the active surface 201, and the separation distance is determined based on a focus length.

Substantially, since the inner wall of the barrel 810 is formed with a smooth surface, the spacers 730 and 735 or the lenses 710 and 715 are inserted into the barrel 810 without being caught by the inner wall. Accordingly, the position of the relative spacers 730, 735 or the lenses 710, 715 within the barrel 810 is constant.

Therefore, if the height of the housing 310, the height of the active surface 201 of the image sensor 200, the thickness of the window 401, etc. are fixed, ignoring the change in the difference between the processes, the focal length is determined by the distance of the first spacer 730. It depends on the thickness. Therefore, the distance between the window 401 and the active surface 201, that is, the back focal length, is fixed, and the focus is adjusted by the thickness of the first spacer 730. If the thickness of the first spacer 730 is kept constant according to the focal length, the first spacer 730 will always be mounted on the window 401, so that the first spacer 730 is always mounted on the window 401. The relative height can be kept substantially constant. When the thickness of the second spacer 735 is similarly fixed, the distance between the first lens 710 and the second lens 715 can be kept constant.

Therefore, even when the barrel 810 and the lens unit 700 are assembled to the various image sensor packages 601, respectively, the distances between the assembled lenses 710 and 715 and the active surface 201 are preset in consideration of the focus. It can be kept constant at a distance. This means that the process for further focus adjustment can be omitted in the assembly process. Thus, the assembly process can be performed in a simpler process.

On the other hand, the lens entrance member 737 is introduced to serve to prevent the lens unit 700 inserted into the barrel 810 from moving. To this end, after the lens unit 700 is inserted into the barrel 810, the contact portion between the lens inlet member 737 and the barrel 810 may be bonded with an adhesive. In addition, the lens entrance member 737 may be formed as an annular member having an outer circumference that fits the cylinder when the barrel 810 or the like is substantially formed in a cylinder, and at this time, the edge of the second lens 715 It acts as a barrier to block the incident light to the furnace. That is, it acts as an aperture. Accordingly, the lens entrance member 737 may be made of an opaque material such as ink, carbon black, metal, and the like.

As such, by inserting the lens unit 700 into the barrel 810 and attaching the lens unit 700 to the barrel 810 using an adhesive, the lens unit 700 as shown in FIG. An image sensor package 603 may be formed that is assembled to align to the active surface 201 of FIG.

As such, the barrel 810 may be assembled one by one into the individual image sensor package 601 as shown in FIG. 7A, but the window 401 or / and the housing 310 are in the form of a strip to which the barrel 810 is connected. It may be assembled on or directly on the cover plate 400. In this case, first, it is preferred to provide an injection molded barrel strip with the barrels 810 interconnected.

FIG. 8 is a cross-sectional view schematically illustrating a barrel strip for an image sensor package having a lens unit according to an exemplary embodiment of the present invention.

Referring to FIG. 8A, a barrel strip 800 is prepared in which individual barrels 810 as shown in FIG. 7A are connected in a strip form. The barrel strip 800 may be manufactured by injection molding or the like, and the barrel strip 800 may be made of a plastic material suitable for injection molding, such as polycarbonate or polyphenylsulfide, similar to the housing strip 300 of FIG. 2A. It can be molded into a plastic such as (polyphenylsulfide).

This barrel strip 800 is shaped such that the opening 811 of the barrel 810 is aligned with the opening 311 of the housing strip 300 in FIG. 2A. In addition, as shown in FIG. 8B, the lower end portion 813 of the barrel 810 is fitted with a window 401 having a width narrower than that of the housing 310 attached to the housing 310 as shown in FIG. 7A. It may be molded into a shape having a space.

FIG. 9 is a cross-sectional view schematically illustrating a process of preparing an image sensor package assembly to which a barrel strip is assembled according to an embodiment of the present invention.

Referring to FIG. 9, as described with reference to FIGS. 1A through 4B, an assembly 600 in which a substrate 100 on which image sensors 200 are arranged, a housing strip 300, and a cover plate 400 are attached to each other. Prepare. After the opening, the cover plate 400 of the assembly 600 is cut to separate the image sensor 200 and separated. For example, a cutting sawing process using the first blade 610 is performed to remove portions of the cover plate 400 positioned between the image sensors 200 to expose the upper surface 303 of the lower housing strip 300. .

At this time, the step between the upper surface 303 of the housing strip 300 and the separated window 401 is such that the barrel 810 of the barrel strip (800 of FIG. 8) is aligned with the active surface 201 of the image sensor 200. Act as a criterion, e.g., sort key. As such, the barrel strip 800 is aligned on the assembly 600 in which the separated window 401 is formed.

10 is a schematic cross-sectional view for explaining a process of assembling a barrel strip to an image sensor package assembly according to an embodiment of the present invention.

Referring to FIG. 10, the barrel strip 800 is aligned and attached so that the bottom surface contacts the top surface 303 of the housing strip 300 exposed by the separated window 401 as shown in FIG. 9. In this case, the contact surface adhesive of the barrel strip 800 and the upper surface 303 of the housing strip 300 is adhered to each other by an epoxy resin-based adhesive that may be cured by thermosetting or ultraviolet rays.

FIG. 11 is a cross-sectional view schematically illustrating a process of separately separating an image sensor package having a barrel according to an embodiment of the present invention.

Referring to FIG. 11, the second blade 620 is aligned with the connection portion 814 between the barrel 810 and the barrel 810 of the assembled barrel strip 800, and the second blade 620 is used. This connection site 814 is sawed out. This cutting sawing process is performed to cut the lower substrate 100 to separate the individual image sensor packages.

12 is a cross-sectional view schematically illustrating an image sensor package having a barrel according to an embodiment of the present invention.

Referring to FIG. 12, the cutting sawing process as described with reference to FIG. 11 separates the image sensor package 604 with the barrel 810 from the assembly 600 of the image sensor package.

The lens unit 700 is assembled to the image sensor package 604 to which the barrel 810 is attached as described with reference to FIG. 7A. Thus, an image sensor package 603 similar to that shown in FIG. 7B is completed.

By using the barrel strip 800 as described above, it is possible to realize mass production advantages of assembling a plurality of image sensor packages at the same time, and to greatly reduce the possibility of large tolerances between image sensor packages assembled at the same time. Process benefits can be realized.

Meanwhile, as described with reference to FIGS. 4A and 4B, the cover plate 400 is assembled to the housing strip 300, and then separated into individual image sensor packages 601 as shown in FIGS. 5A and 5B. Alternatively, each of the previously separated windows may be assembled to the housing strip and then separated.

13 to 16 are schematic views for explaining a process of assembling separate separate windows in a housing strip according to another embodiment of the present invention.

Referring to FIG. 13, as described with reference to FIGS. 1A and 1B, the image sensors 1200 are attached to the substrate 1100 with the active surface 1201 facing upward. And, as described with reference to FIGS. 2A and 2B, the individual housings 1310 with openings 1311 form a interconnecting housing strip 1300.

This housing strip 1300 is attached to the substrate 1100 as described with reference to FIGS. 4A and 4B. At this time, unlike the description with reference to FIGS. 3, 4A, and 4B, the individual windows 1401 prepared in the form of individual pieces previously separated are arranged on the respective openings 1311 as shown in FIG. Window 1401 is hermetically glued to the opening 1311 of the housing strip 1300.

At this time, as shown in FIG. 14, the support 1315 on which the respective window 1401 is to be mounted may be prepared to protrude into the opening 1311 around the opening 1311 of the individual housing 1310.

Referring to FIG. 15, the structure in which the individual windows 1401 are assembled in the housing 1310 is sawed using the third blade 630, as described with reference to FIG. 5B, and thus, the individual image sensor packages ( 605).

Referring to FIG. 16, as described with reference to FIGS. 7A and 7B, the barrel 810 is adhered and assembled on the image sensor package 605, and the lens unit 700 is formed in the opening 811 in the barrel 810. ) To assemble. Accordingly, the image sensor package 605 having the lens unit 700 is completed.

According to the present invention described above, an image sensor package such as a package of a ceramic leaded chip carrier (CLCC) type in an air cavity type can be miniaturized, yield improved, and low cost. In the package structure of a typical solid-state image pickup device, the ceramic package has a step size, which is limited in size, the price is also expensive, and the processing is complicated by handling it individually, and particles may be generated in the barrel part. It is expected that the inconvenience of having to focus the lens separately, but the present invention can solve and improve these disadvantages.

Specifically, according to the present invention, as the lens unit is simply slid into the barrel and assembled to the barrel by being sealed, it is possible to avoid the generation of particles by friction between the barrel and the lens holder.

In addition, since the lens parts in the barrel are simply inserted and assembled with spacers having a fixed back focal length based on the window glass surface, which is an IR filter, the parts are sealed by friction when assembling the lens parts to the barrel. Contamination such as generation of unwanted particles can be effectively prevented, and a separate focusing process can be omitted.

It is also possible to assemble the IR filter windows individually. Alternatively, by assembling on the housing strip in the form of one large cover plate rather than individually separated windows, it is possible to increase the process efficiency compared to the process of inserting individual separate IR-filter windows individually.

According to the present invention, a set of tasks for forming an image sensor package are all assembled into individual packages by saw singulation step by step after assembling the parts in a multi strip state and after assembly is completed. The process is done. Thus, mass assembly production of image sensor packages is possible.

As mentioned above, although this invention was demonstrated in detail through the specific Example, this invention is not limited to this, It is clear that the deformation | transformation and improvement are possible by the person of ordinary skill in the art within the technical idea of this invention.

Claims (47)

Providing a substrate on which a plurality of image sensors are mounted; A housing strip having a plurality of housings having an aperture corresponding to the upper surface of the image sensor and having an internal cavity to wrap around the image sensor and interconnected correspondingly to the arrangement of the image sensors; Preparing); Attaching the housing strip to the substrate and attaching a transparent cover plate to seal the opening on the housing strip; And And sequentially cutting the transparent cover plate, the housing strip, and the substrate into individual image sensor packages. The method of claim 1, wherein preparing the substrate Stacking another integrated circuit chip between the image sensor and the substrate. The method of claim 1, wherein providing the housing strip And molding the housing strip by injection molding. The method of claim 1, wherein attaching the housing strip to the substrate comprises: And attaching a lower surface of the housing strip to an area surface between the image sensors of the substrate by using an adhesive. The method of claim 1, wherein the attaching step Applying a semisolid adhesive to the contact surface of the housing strip with the substrate and the transparent cover plate; And And heat-pressing the transparent cover plate and the substrate against the housing strip to cure the adhesive. The method of claim 5, And said curing step involves vacuum pumping. The method of claim 1, And said separating step comprises aligning and cutting the blade in the middle of the connection between the housings of said housing strip. The method of claim 1, The separating step is Cutting the cover plate; And And cutting said housing strip portion and said substrate exposed by cutting said cover plate. The method of claim 8, And the cutting steps are performed such that the cut surface of the cover plate is located inward of the cut surface of the housing strip portion and the substrate. The method of claim 8, And the cutting steps are performed such that the cut surface of the cover plate is flush with the cut surface of the housing strip portion and the substrate. The method of claim 8, And the cover plate is cut and separated to be mounted on the housing strip so that the cover plate is cut to cover the opening. Providing a substrate on which a plurality of image sensors are mounted; Providing a housing strip in which a plurality of housings having apertures corresponding to an upper surface of the image sensor are interconnected; Sealingly attaching the housing strip and a transparent cover plate to the substrate; And And sequentially cutting the transparent cover plate, the housing strip, and the substrate into individual image sensor packages. Providing a substrate on which a plurality of image sensors are mounted; A housing strip having a plurality of housings having an aperture corresponding to the upper surface of the image sensor and having an internal cavity to wrap around the image sensor and interconnected correspondingly to the arrangement of the image sensors; Preparing); Attaching the housing strip to the substrate and attaching a transparent cover plate to seal the opening on the housing strip; Sequentially cutting the transparent cover plate, the housing strip, and the substrate into individual image sensor packages; Assembling a barrel having an opening aligned with the opening of the housing to the separated image sensor package; Inserting a lens portion into the opening of the barrel; And And bonding the contact surface of the barrel to the contact surface of the lens unit. The method of claim 13, wherein the attaching step Applying a semisolid adhesive to the contact surface of the housing strip with the substrate and the transparent cover plate; And And heat-pressing the transparent cover plate and the substrate against the housing strip to cure the adhesive. The method of claim 14, And said curing step involves vacuum pumping. The method of claim 13, wherein the separating step Cutting a portion of the cover plate using a first blade to separate it into a plurality of windows that seal the openings of the respective housings; And  Cutting and separating the connecting portion of the housing strip exposed by the window by cutting the connecting portion and the substrate below using the second blade having a smaller width than the first blade. How to assemble a sensor package. The method of claim 12, The barrel is an image sensor package assembly method, characterized in that the transparent cover plate is assembled perpendicular to the surface in the form of a cylinder (cylinder) smoothly provided on the inner side of the opening. The method of claim 12, wherein inserting the lens unit Providing a lens to be inserted into the barrel; Arranging spacers spaced apart from the lens and the cover plate at regular intervals below the lens; Aligning an aperture that shields a portion of an edge of the lens on the lens; Inserting the aligned spacers, the lens and the aperture into the barrel; And And assembling the contact portion of the diaphragm and the inner surface of the barrel with an adhesive. The method of claim 18, And attaching the spacer, the lens, and the aperture to each other with an adhesive. The method of claim 18, wherein inserting the lens unit Aligning a second spacer with the lens; And And aligning the second lens on the second spacer. Providing a substrate on which a plurality of image sensors are mounted; Providing a housing strip in which a plurality of housings having apertures corresponding to an upper surface of the image sensor are interconnected; Sealingly attaching the housing strip and a transparent cover plate to the substrate; Sequentially cutting the transparent cover plate, the housing strip, and the substrate into individual image sensor packages; Assembling a barrel having an opening in the separated image sensor package; And And inserting and tightening a lens portion into the opening of the barrel. Providing a substrate on which a plurality of image sensors are mounted; A housing strip having a plurality of housings having an aperture corresponding to the upper surface of the image sensor and having an internal cavity to wrap around the image sensor and interconnected correspondingly to the arrangement of the image sensors; Preparing); Attaching a bottom surface of the housing strip to the substrate and attaching a transparent cover plate to the top surface of the housing strip to seal the opening; Providing a barrel strip in which a plurality of barrels into which a lens portion to be aligned with an opening of the housing is inserted are interconnected; Cutting a portion of the cover plate using a first blade to separate it into a plurality of windows that seal the openings of the respective housings; Attaching a bottom surface of the barrel strip to a top surface of the housing strip exposed by the window; And Aligning the second blade having a narrower width than the first blade to the connection portion of the barrel strip, cutting the connection portion and the substrate below to separate the individual image sensor packages having a barrel for a lens portion; Image sensor package assembly method comprising the. The method of claim 22, And a portion of the cover plate is cut so that the separated window is mounted on the housing strip to cover the opening. The method of claim 22, wherein preparing the barrel strip And injection molding the cylindrical inner cylinders of the barrel to be smoothly provided and the transparent cover plate is perpendicular to the surface. 23. The method of claim 22, wherein attaching the barrel strip is And adhesive is used on the contact surface of the barrel strip and the housing strip or the contact surface of the barrel strip and the window. 23. The method of claim 22, wherein after attaching the barrel strip Inserting a lens portion into the opening of the barrel; And And bonding the contact surface of the barrel to the contact surface of the lens unit with an adhesive. Providing a substrate on which a plurality of image sensors are mounted; A housing strip having a plurality of housings having an aperture corresponding to the upper surface of the image sensor and having an internal cavity to wrap around the image sensor and interconnected to correspond to the arrangement of the image sensors; Preparing); Attaching the housing strip to the substrate and attaching a transparent cover plate to seal the opening on the housing strip; Providing a barrel strip in which a plurality of barrels into which a lens portion to be aligned with an opening of the housing is inserted are interconnected; Aligning and attaching the barrel strip to the transparent cover plate; And And cutting along the connecting portion of the barrel strip to separate the individual image sensor packages with the barrel for the lens portion. The method of claim 27, Before attaching the barrel strip And cutting the cover plate. The method of claim 28, And the cutting steps are performed such that the cut surface of the cover plate is located inside the cut surface of the barrel strip. The method of claim 29, And the cover plate is cut and separated to be mounted on the housing strip so that the cover plate is cut to cover the opening. The method of claim 27, The cutting of the barrel strip may be performed by continuously cutting the housing strip portion and the substrate portion below so that the cutting surface is positioned on the same surface. The method of claim 27, wherein preparing the barrel strip And injection molding the inner side of the opening of the barrel to be smoothly provided, and the transparent cover plate perpendicular to the surface to connect cylinders in the form of cylinders. Providing a substrate on which a plurality of image sensors are mounted; Providing a housing strip in which a plurality of housings having apertures corresponding to an upper surface of the image sensor are interconnected; Providing a barrel strip in which a plurality of barrels into which a lens portion to be aligned with an opening of the housing is inserted are interconnected; Sealingly attaching the housing strip and a transparent cover plate to the substrate; Assembling the barrel strip such that the individual barrels are aligned with the openings in the housing; Separating the individual image sensor packages; And And assembling and inserting a lens unit into the barrel. A housing having a substrate, an image sensor mounted on the substrate, an interior cavity having an aperture corresponding to an upper surface of the image sensor, and having an internal cavity to wrap around the image sensor, and on the housing Forming a structure comprising a window attached to seal the opening; Assembling a barrel having an opening aligned with the opening of the housing of the structure; Inserting a lens portion into the opening of the barrel; And And bonding the contact surface of the barrel to the contact surface of the lens unit. 35. The method of claim 34, wherein forming the structure Forming the window such that the window exposes an upper surface of the housing, And the barrel is in contact with the top surface of the housing, the bottom surface of which is exposed, and attached by an adhesive. The method of claim 34, wherein And the barrel is assembled perpendicular to the surface of the window in the form of a cylinder having a smooth inner surface of the opening. The method of claim 34, wherein inserting the lens unit Providing a lens to be inserted into the barrel; Arranging spacers spaced apart between the lens and the window at regular intervals below the lens; Aligning an aperture that shields a portion of an edge of the lens on the lens; Inserting the aligned spacers, the lens and the aperture into the barrel; And And assembling the contact portion of the diaphragm and the inner surface of the barrel with an adhesive. The method of claim 37, And attaching the spacer, the lens, and the aperture to each other with an adhesive. The method of claim 34, wherein inserting the lens unit Aligning a second spacer with the lens; And And aligning the second lens on the second spacer. A housing having a substrate, an image sensor mounted on the substrate, an interior cavity having an aperture corresponding to an upper surface of the image sensor, and having an internal cavity to wrap around the image sensor, and on the housing A structure comprising a window attached to seal the opening; A barrel assembled to align with an opening of the housing on the window; And And a lens unit inserted into and attached to the barrel. The method of claim 40, And the window has a size smaller than the outer shape of the barrel and the housing but larger than the opening and mounted on the housing. The method of claim 40, The barrel is an image sensor package, characterized in that the inner surface of the opening is provided with a smooth and formed in the form of a cylinder (cylinder) perpendicular to the window surface. The method of claim 40, wherein the lens unit A lens to be inserted into the barrel; A spacer arranged below the lens to be spaced apart from the lens and the window at regular intervals; And And an aperture arranged to shield a portion of an edge of the lens on the lens. The method of claim 43, And said spacer, said lens and said aperture are attached to each other with an adhesive. The method of claim 43, wherein the lens unit A second spacer aligned on the lens; And And a second lens arranged on the second spacer. A housing having a substrate, an image sensor mounted on the substrate, an interior cavity having an aperture corresponding to an upper surface of the image sensor, and having an internal cavity to wrap around the image sensor, and on the housing A structure comprising a window attached to seal the opening; A barrel assembled to align with an opening of the housing; And And a lens unit inserted into and attached to the opening of the barrel, the lens unit including a lens and a spacer introduced under the lens to maintain a spaced distance between the lens and the window. Providing a substrate on which a plurality of image sensors are mounted; A housing strip having a plurality of housings having an aperture corresponding to the upper surface of the image sensor and having an internal cavity to wrap around the image sensor and interconnected correspondingly to the arrangement of the image sensors; Preparing); Attaching a bottom surface of the housing strip to the substrate; Attaching windows respectively covering the openings; Cutting the housing strip and the substrate into separate image sensor packages; Assembling a barrel having an opening aligned with the opening of the housing in the separated image sensor package; And And inserting and attaching a lens portion into the opening of the barrel.

Images