What is claimed is:
1. An entry sheet for drilling for a printed wiring board material, which comprises a water-soluble resin (A) and a water-insoluble lubricant (B) as essential components.
2. An entry sheet according to claim 1, wherein the thickness of the sheet is 10 to 500 m.
3. An entry sheet according to claim 1, wherein the amount of the water-insoluble lubricant (B) is 0.1 to 20 parts by weight per 100 parts by weight of the total amount of the water-soluble resin (A) and the water-insoluble lubricant (B).
4. An entry sheet according to claim 1, wherein the water-soluble resin (A) is at least one member selected from the group consisting of polyethylene glycol, polyethylene oxide, polypropylene glycol, polypropylene oxide, polyvinyl alcohol, sodium polyacrylate, polyacrylamide, polyvinylpyrrolidone, carboxymethylcellulose, polytetramethylene glycol and polyether ester.
5. An entry sheet according to claim 4, which further comprises a water-soluble lubricant (C).
6. An entry sheet according to claim 3, wherein the water-insoluble lubricant (B) is at least one member selected from the group consisting of amide-based compounds, fatty-acid-based compounds and fatty-acid-ester-based compounds.
7. An entry sheet according to claim 5, wherein the water-soluble lubricant (C) is at least one member selected from the group consisting of monoether of polyoxyethylene, ester of polyoxyethylene, polyoxyethylene sorbitan monostearate, polyglycerine monostearate and a polyoxyethylene propylene block polymer.
8. An entry sheet according to claim 1, which further comprises a surfactant (D).
9. An entry sheet according to claim 1, wherein a metal foil is combined with one surface of the sheet.
10. An entry sheet according to claim 9, wherein the metal foil has a thickness of 5 to 200 m.
11. An entry sheet for drilling for a printed wiring board material, which sheet comprises a metal foil having a thickness of 5 to 200 m and a layer of a thermosetting resin (E) which layer has an average thickness of 1 to 10 m, the layer of the thermosetting resin (E) being formed on one surface of the metal foil.
12. An entry sheet according to claim 11, wherein the thermosetting resin (E) is a thermosetting resin containing an epoxy resin or a cyanate ester resin as an essential component.
13. An entry sheet according to claim 11, which further comprises a water-soluble resin (A) layer having a thickness of 20 to 500 m on the thermosetting resin (E) layer.
14. An entry sheet according to claim 13, wherein the water-soluble resin (A) layer further comprises a water-insoluble lubricant (B).
15. An entry sheet according to claim 13, wherein the water-soluble resin (A) layer further comprises a water-soluble lubricant (C).
16. An entry sheet according to claim 11, wherein the metal foil is an aluminum foil.
17. A method for drilling a hole in a printed wiring board material, comprising disposing the entry sheet for drilling recited in claim 11 on a printed wiring board material such that a metal foil surface side of the entry sheet is brought in contact with the printed wiring board material and drilling a hole with a drill from a resin surface side.
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 glass antenna installed on a glass attached to an opening portion of a vehicle body, the glass having a first edge and a second edge opposite the first edge, the glass antenna including antenna elements comprising:
a first antenna element extending linearly from a feed point provided at the first edge of the glass toward the second edge of the glass;
a second antenna element folded and connected to a distal end of the first antenna element, the second antenna element extending in a direction opposite to a direction of extension of the first antenna element, the second antenna element being connected to a ground point provided on the first edge of the glass; and
at least one third antenna element extending along the opening portion of the vehicle body to at least one of the distal end of the first antenna element and a proximal end of the second antenna element.
2. The glass antenna of claim 1, wherein the first antenna element and the second antenna element extend in correspondence to a plane of polarization of a radio wave to be received.
3. The glass antenna of claim 1, wherein the at least one third antenna element is spaced from the second edge of the glass by an interval of 50 mm or less.
4. The glass antenna of claim 1, wherein a ratio of a length of at least one third antenna element to a length of each of the first antenna element and the second antenna element is 1.0 or less.
5. The glass antenna of claim 1, wherein the at least one third antenna element includes a first antenna section extending away from the second antenna element and a second antenna section extending away from the first antenna element, and wherein the antenna elements further comprising:
a first bypass antenna element branching off from an end portion of the first antenna section and extending to the feed point; and
a second bypass antenna element branching off from an end portion of the second antenna section and extending to the ground point.