1. A method of producing a multi-layered wiring board comprising:
forming an insulating layer of a photosensitive resin on a substrate, and exposing and developing said insulating layer to form holes having respective sizes in said insulating layer;
depositing a curable resin member selected from the group consisting of polymethylsiliceous siloxane, a melamine resin, an acrylate resin, and an epoxy resin, and containing particles of one of calcium carbonate and polybutadiene rubber, onto said insulating layer having the holes and filling the holes;
heating said curable resin to form a cured thin film from only a part of said curable resin, at an interface of said insulating layer and said curable resin, leaving a part of said curable resin uncured;
removing the part of said curable resin that is uncured, but not said cured thin film, leaving via-holes where the holes were made in said insulating layer, the via-holes being smaller in size than the holes due to said cured thin film remaining in the holes on said insulating film; and
filling the via-holes with an electrically conductive material, thereby forming vias.
2. The method of producing a multi-layered wiring board according to claim 1, wherein said photosensitive resin is at least one member selected from the group consisting of an epoxy resin, an epoxy-modified acrylate resin, a cationic polymerization product of an epoxy resin, a phenol resin, a melamine resin, a carboxy-modified epoxy acrylate, and a cinnamate.
3. The method of producing a multi-layered wiring board including a plurality of stages of via-holes formed by repeating the process of claim 1, wherein the via-holes of later-formed stages are smaller in size than the via-holes of earlier formed stages.
4. A method of producing a multi-layered wiring board comprising:
forming an insulating layer of a photosensitive resin on a substrate, and exposing and developing said insulating layer to form holes having respective sizes in said insulating layer;
depositing a curable resin member, selected from the group consisting of a water-soluble resin and a water-soluble cross-linking agent, and containing particles of one of calcium carbonate and polybutadiene rubber, onto said insulating layer having the holes and filling the holes;
heating said curable resin to form a cured thin film from only a part of said curable resin, at an interface of said insulating layer and said curable resin, leaving a part of said curable resin uncured;
removing the part of said curable resin that is uncured, but not said cured thin film, leaving via-holes where the holes were made in said insulating layer, the via-holes being smaller in size than the holes due to said cured thin film remaining in the holes on said insulating film; and
filling the via-holes with an electrically conductive material, thereby forming vias.
5. The method of producing a multi-layered wiring board according to claim 4, wherein said photosensitive resin is at least one member selected from the group consisting of an epoxy resin, an epoxy-modified acrylate resin, a cationic polymerization product of an epoxy resin, a phenol resin, a melamine resin, a carboxy-modified epoxy acrylate, and a cinnamate.
6. The method of producing a multi-layered wiring board including a plurality of stages of via-holes formed by repeating the process of claim 4, wherein the via-holes of later-formed stages are smaller in size than the via-holes of earlier formed stages.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A projection type image display device comprising:
a light source unit;
an image generating unit configured to modulate light from the light source unit according to a video input signal to generate image light;
a projecting unit configured to project the generated image light;
a first housing that houses the light source unit, the image generating unit, and the projecting unit;
a second housing; and
a joint unit configured to connect the first housing and the second housing, and support the first housing to be able to rotate within a predetermined angular range,
wherein the joint unit includes a ball joint mechanism having a shaft member with a spherical portion, a first holding portion embracing and holding the spherical portion, and a second holding portion,
the spherical portion of the shaft member is held rotatably by the first holding portion, and
the first holding portion is configured to be rotatable around a predetermined rotational axis against the second holding portion.
2. The projection type image display device according to claim 1, wherein
the first holding portion has at its end portion a hollow portion embracing the spherical portion, and a notched portion is formed on a part of an outer wall defining the hollow portion.
3. The projection type image display device according to claim 2, wherein
in the first holding portion, a support portion is provided at the end portion in which the notched portion is formed, and
the support portion is a member for supporting the shaft member from below when the shaft member is placed on top of the support portion in a state where the first housing is hung and supported by the joint portion.
4. The projection type image display device according to claim 3, wherein
a direction of the predetermined rotational axis is different from a direction of an axis around which the shaft member can rotate while the shaft member is supported by the support portion.
5. The projection type image display device according to claim 1, wherein
the predetermined rotational axis is an axis extending in a vertical direction of a case where the first housing is hung and supported by the joint portion.
6. The projection type image display device according to claim 1, wherein
the direction of rotation of the predetermined rotational axis is a direction orthogonal to the axial direction of rotational axis.
7. The projection type image display device according to claim 1, wherein
the joint unit further has a lock portion pressing the spherical portion inside the first holding portion.
8. The projection type image display device according to claim 1, wherein
the second housing houses a power supply unit for supplying electric power to the light source unit and the image generating unit.