KR-102962252-B1 - Light shields, optical components, covers, packages for mounting electronic components, and imaging devices

Abstract

The light-shielding film has a first surface and a second surface located opposite to the first surface. The light-shielding film comprises a resin, carbon black, and a first type of graphite filler, and in a cross-sectional view, the longitudinal direction of the first type of graphite filler follows at least one of the first surface and the second surface.

Inventors

• 마에다 준키

Assignees

• 교세라 가부시키가이샤

Dates

Publication Date

20260508

Application Date

20221019

Priority Date

20211029

Claims (13)

1. A shading film having a first surface and a second surface located opposite to the first surface, Comprising a resin, carbon black, a first type graphite filler, a second type graphite filler, and a third type graphite filler, In the longitudinal section, the longitudinal direction of the first type graphite filler follows at least one of the first surface and the second surface, and In the cross-sectional view, the longitudinal direction of the second type graphite filler follows the thickness direction of the light-shielding film, and In the longitudinal section, the longitudinal direction of the third type graphite filler is the thickness direction of the shading film and the It is inclined at the midpoint of the direction along one surface, and When a layer corresponding to 1/4 of the film thickness of the shading film from the first surface is called the first layer, a layer corresponding to 1/4 of the film thickness of the shading film from the second surface is called the third layer, and a layer between the first layer and the third layer is called the second layer, In the first layer above, the first type graphite filler is greater than the sum of the second type graphite filler and the third type graphite filler, and In the third layer above, the first type graphite filler is greater than the sum of the second type graphite filler and the third type graphite filler, and In the second layer above, the sum of the second type graphite filler and the third type graphite filler is greater than the first type graphite filler, Shade net.
2. In Article 1, The above-mentioned first surface is a surface where light is irradiated, and A light-shielding film in which the first type graphite filler is located in a layer closer to the second surface than in the central surface between the first surface and the second surface.
3. In Article 2, A light-shielding film in which the above-mentioned first type graphite filler is also located in a layer closer to the first surface than in a central surface between the first surface and the second surface.
4. delete
5. In Article 1, A light-shielding film comprising a plurality of the above-mentioned second type graphite fillers, wherein the planes along the longitudinal direction in the cross-section face each other.
6. In Article 1, A light-shielding film surrounding the resin and the carbon black with the first type graphite filler and the second type graphite filler in the cross-sectional view.
7. delete
8. In Article 1, A light-shielding film surrounding the resin and the carbon black with the first type graphite filler and the third type graphite filler in the cross-sectional view.
9. In Article 1, A light-shielding film surrounding the resin and the carbon black with at least two of the first type graphite filler, the second type graphite filler, and the third type graphite filler in the cross-sectional view.
10. An optical member having a third surface, and An optical component having a light-blocking film described in claim 1 located on the third surface above.
11. A donation having a fourth side, and A cover body having a shading film described in claim 1 located on the 4th side above.
12. A mounting section for mounting electronic components, and An opening that allows light to pass through, and A package for mounting electronic components having a light-blocking film as described in claim 1.
13. The electronic component mounting package described in claim 12, and An imaging device having an imaging element mounted in the above-mentioned package for mounting electronic components.

Description

Light shields, optical components, covers, packages for mounting electronic components, and imaging devices The present disclosure relates to a light-shielding film, an optical component, a cover body, a package for mounting electronic components, and an imaging device. Japanese Patent Publication No. 2007-115921 discloses a light-shielding film containing carbon black and a solid-state imaging element having said light-shielding film. FIG. 1a is a plan view showing an optical component according to Embodiment 1 of the present disclosure. Figure 1b is a cross-sectional view along the line B1-B1 of Figure 1a. FIG. 2 is a drawing showing a cross-sectional view of a light-blocking film according to an embodiment of the present disclosure. Figure 3 is a diagram illustrating the first action of the graphite filler. Figure 4 is a diagram illustrating the second action of the graphite filler. Figure 5 is a diagram illustrating the third action of the graphite filler. Figure 6 is a diagram illustrating the fourth action of the graphite filler. Figure 7 is a graph showing the relationship between the graphite filler content and the reflectance of the light-shielding film. Figure 8 is a diagram showing the distribution of Type 1 to Type 3 graphite fillers in the cross-sectional view of a shading film. Figure 9 is a graph showing the transmittance of a light-blocking film according to an embodiment. Figure 10 is a graph showing the reflectance of a light-blocking film according to an embodiment. FIG. 11 is a perspective view showing a graphite filler. FIG. 12a is a plan view showing an optical component of embodiment 2 of the present disclosure. FIG. 12b is a longitudinal section along the line B2-B2 of FIG. 12a. FIG. 13a is an exploded perspective view showing a package for mounting electronic components and an imaging device of an embodiment of the present disclosure. FIG. 13b is a cross-sectional view showing a package for mounting electronic components and an imaging device according to an embodiment of the present disclosure. Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. FIG. 1a is a plan view showing an optical component according to Embodiment 1 of the present disclosure. FIG. 1b is a cross-sectional view along the line B1-B1 of FIG. 1a. A light-shielding film (1) according to an embodiment of the present disclosure has a first surface (S1) to which light is irradiated and a second surface (S2) located opposite to the first surface (S1), and is a film that reduces the amount of light transmitted and reflected. In FIG. 1a and FIG. 1b, the light-shielding film (1) is shown in a mesh form. An optical component (10) according to embodiment 1 of the present disclosure comprises an optical member (11) having a third surface (S3) and a light-blocking film (1). The optical member (11) may be plate-shaped as shown in FIG. 1a and FIG. 1b, but may also be prism-shaped or lens-shaped. The optical member (11) may be a light-transmitting member (such as glass), and a part of the third surface (S3) may be a surface through which light passes. Alternatively, the optical member (11) may be an optical filter member that exerts an effect according to the wavelength, polarization plane, angle of incidence, etc. of the light. Or, the optical member (11) may be a mirror that reflects light from a part of the third surface (S3). The light-blocking film (1) is located on the third surface (S3) of the optical member (11). The light-blocking film (1) may be fixed to the third surface (S3) of the optical member (11). The light-blocking film (1) may be located around the light-transmitting area (R1) that transmits light as shown in FIG. 1a, but may also be located in various other areas where light blocking is required. FIG. 2 is a drawing showing a cross-sectional view of a light-shielding film according to an embodiment of the present disclosure. In FIGS. 2 to 6, the irradiated light is indicated by a dotted arrow. A cross-sectional view of the light-shielding film (1) refers to a cross-section taken when cut along the thickness direction of the film (a direction perpendicular to the surface of the film). The light-shielding film (1) comprises a resin (Ha), carbon black (Hb), and a plurality of graphite fillers (F). In FIG. 2, to avoid clutter, only a few of the plurality of graphite fillers (F) are labeled. The resin (Ha) may be a thermosetting resin or an epoxy resin. With the above composition, the amount of outgassing (gas generated by heating after curing) can be suppressed to a low level. Carbon black (Hb) may be mixed with the resin (Ha) so as to be uniformly distributed within the resin (Ha). The carbon black (Hb) mixed with the resin (Ha) has the characteristics of reducing light transmittance, reducing light reflection, and absorbing light over a wide wavelength range. The graphite filler (F) may be a flake-shaped filler. In the cross-sectional view of the light-