1. A blast-resistant glass block panel comprising:
a plurality of glass blocks arranged in a panel, wherein each glass block comprises a front face, a rear face, and four side walls, wherein said side walls possess a concave profile, further wherein said side walls include a protrusion that runs around the perimeter of said glass block parallel to said front face and said rear face, wherein a notch is located at the center of each side wall, each block forming a space with an adjacent block in said panel;
a rigid spacer placed in each said respective space, wherein said rigid spacers possess a convex shape that substantially corresponds the concave profile of said glass block, further wherein said spacers include a notch at the center of said spacer;
a perimeter channel disposed around a perimeter of the panel, wherein the perimeter channel has front and rear legs that extend over portions of the front and rear faces, respectively, of each said glass block defining the perimeter of the panel;
a two-piece channel disposed around said perimeter channel, wherein said two-piece channel includes a primary channel member which is adapted to be attached to a frame, and a secondary channel member which is attachable to the primary channel member, wherein the two-piece channel has front and rear legs that extend over and past the front and rear legs of the perimeter channel on said glass blocks on the perimeter of said panel; and
sealant placed between each of said plurality of glass block and said rigid spacers.
2. The blast-resistant glass block panel of claim 1, wherein each of said glass block possesses a front face and a rear face having a thickness of at least \xbe inch.
3. The blast-resistant glass block panel of claim 1, wherein said rigid spacers are adapted to provide a consistent spacing between said glass block.
4. The blast-resistant glass block panel of claim 1, wherein said rigid spacers are plastic.
5. The blast-resistant glass block panel of claim 4, wherein said plastic is vinyl.
6. The blast-resistant glass block panel of claim 1, wherein said perimeter channel is plastic.
7. The blast-resistant glass block panel of claim 1, wherein said two-piece channel is metal.
8. The blast-resistant glass block panel of claim 7, wherein said metal is aluminum or an aluminum alloy.
9. The blast-resistant glass block panel of claim 1, wherein said sealant is silicone.
10. The blast-resistant glass block panel of claim 9, wherein said silicone is a structural silicone.
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 magnetic head for a perpendicular recording system comprising a main pole and an auxiliary pole, the magnetic head having an element-height direction and a track-width direction, and a leading side and a trailing side, wherein
said main pole has a yoke part and a pole tip,
said pole tip includes a first section having a predetermined film thickness in which the tip is exposed at an air bearing surface, and a second section which is located above said first section in a back part of the element-height direction and has an area where a face at the leading side is inclined against the air bearing surface and the film thickness is gradually increased toward the back part of the element-height direction.
2. A magnetic head according to claim 1, wherein said second section has a shape in which the width in the track-width direction extends continuously toward the back part of the element-height direction.
3. A magnetic head according to claim 1, wherein a non-magnetic layer is provided between said first section and second section.
4. A magnetic head according to claim 3, wherein the height of said first section in the element-height direction is less than the width of said first section in the track-width direction exposed on the air bearing surface.
5. A magnetic head according to claim 3, wherein said first section and second section are composed of different magnetic materials.
6. A magnetic head for a perpendicular recording system comprising a main pole and an auxiliary pole, the magnetic head having an element-height direction and a track-width direction, and a leading side and a trailing side, wherein
said main pole has a yoke part and a pole tip,
said pole tip includes a first section having a predetermined film thickness in which the tip is exposed at an air bearing surface and a second section being located above said first section in a back part of the element-height direction, in which a non-magnetic layer is provided between said first section and second section.
7. A magnetic head according to claim 6, wherein the height of said first section in the element-height direction is less than the width of said first section in the track-width direction exposed on the air bearing surface.
8. A magnetic head according to claim 6, wherein said first section and second section are composed of different magnetic materials.
9. A method for fabricating a magnetic head which has a main pole comprising a first section having a predetermined film thickness in which the tip is exposed at an air bearing surface and a second section which is located above said first section in a back part of an element-height direction of the magnetic head and has an area where a face at the leading side is inclined against the air bearing surface and the film thickness is gradually increased toward the back part of the element-height direction, the method comprising:
forming a magnetic film to be said first section over an inorganic insulating layer;
forming a lift-off pattern on said magnetic film;
etching said magnetic film and said inorganic insulating layer by ion-milling, in which an ion incidence angle is controlled, having a tapered angle in the vicinity of said lift-off pattern;
forming a magnetic film to be said second section; and
removing said lift-off pattern.
10. A method for fabricating a magnetic head according to claim 9, further comprising:
forming a non-magnetic layer prior to forming the magnetic layer to be said second section.
11. A method for fabricating a magnetic head which has a main pole comprising a first section having a predetermined film thickness in which the tip is exposed at an air bearing surface and a second section which is located above said first section in a back part of an element-height direction of the magnetic head and has an area where a face at the leading side is inclined against the air bearing surface and the film thickness is gradually increased toward the back part of the element-height direction, the method comprising:
forming a lift-off pattern on an inorganic insulating layer;
etching said inorganic insulating layer by ion-milling, in which an ion incidence angle is controlled, having a tapered angle in the vicinity of said lift-off pattern;
forming a magnetic film to be a part of said second section on said inorganic insulating layer being etched;
a process for removing said lift-off pattern;
planarizing said magnetic film and said inorganic insulating layer; and
forming a magnetic film to be said first section.
12. A method for fabricating a magnetic head according to claim 11, further comprising:
forming a second lift-off pattern on the magnetic film to be said first section;
exposing the magnetic film to be a part of said second section by etching the magnetic film to be said first section by ion-milling, in which the ion incidence angle is controlled, having a tapered angle in the vicinity of said second lift-off pattern;
forming a non-magnetic layer; and
forming a magnetic layer to be a residual part of said second section.
13. A method for fabricating a magnetic head according to claim 11, further comprising:
forming a second lift-off pattern on the magnetic film to be said first section;
exposing the magnetic film to be a part of said second section by etching the magnetic film to be said first section by ion-milling, in which the ion incidence angle is controlled, having a tapered angle in the vicinity of said second lift-off pattern;
forming a non-magnetic layer;
removing the non-magnetic layer on said second section by ion-milling, in which the ion incidence angle is controlled; and
forming a magnetic layer to be a residual part of said second section.
14. A method for fabricating a magnetic head according to claim 11, further comprising:
forming a second lift-off pattern on the magnetic film to be said first section;
exposing the magnetic film to be a part of said second section by etching the magnetic film to be said first section by ion-milling, in which the ion incidence angle is controlled, having a tapered angle in the vicinity of said second lift-off pattern;
forming a non-magnetic layer;
removing the non-magnetic layer except for the part touching the underside of said first section by ion-milling, in which the ion incidence angle is controlled; and
forming a magnetic layer to be a residual part of said second section.
15. A method for fabricating a magnetic head which has a main pole comprising a first section having a predetermined film thickness in which the tip is exposed at an air bearing surface and a second section which is located above said first section in a back part of an element-height direction of the magnetic head and has an area where a face at the leading side is inclined against the air bearing surface and the film thickness is gradually increased toward the back part of the element-height direction, the method comprising:
forming a mask pattern on an inorganic insulating layer;
etching said inorganic insulating layer by ion-milling, in which an ion incidence angle is controlled, having a tapered angle in the vicinity of said lift-off pattern;
removing said mask pattern;
forming a magnetic film to be a part of said second section over said inorganic insulating layer being etched;
removing an unnecessary portion of the magnetic layer by a planarizing treatment; and
forming a magnetic film to be said first section.
16. A method for fabricating a magnetic head according to claim 15, further comprising:
forming a second mask pattern on the magnetic film to be said first section;
exposing the magnetic film to be a part of said second section by etching the magnetic film to be said first section by ion-milling, in which an ion incidence angle is controlled, having a tapered angle in the vicinity of said second mask pattern;
forming a non-magnetic layer; and
forming a magnetic layer to be a residual part of said second section.
17. A method for fabricating a magnetic head according to claim 15, further comprising:
forming a second mask pattern on the magnetic film to be said first section;
exposing the magnetic film to be a part of said second section by etching the magnetic film to be said first section by ion-milling, in which an ion incidence angle is controlled, having a tapered angle in the vicinity of said second mask pattern;
forming a non-magnetic layer;
removing the non-magnetic layer on said second section by ion-milling, in which an ion incidence angle is controlled; and
forming a magnetic film to be a residual part of said second section.
18. A method for fabricating a magnetic head according to claim 15, further comprising:
forming a second mask pattern on the magnetic film to be said first section;
exposing the magnetic film to be a part of said second section by etching the magnetic film to be said first section by ion-milling, in which an ion incidence angle is controlled, having a tapered angle in the vicinity of said second mask pattern;
forming a non-magnetic layer;
removing the non-magnetic layer except for the part touching the underside of said first section by ion-milling, in which the ion incidence angle is controlled; and
forming a magnetic film to be a residual part of said second section.