1. A mat comprising:
a first principal face;
a second principal face opposite to the first principal face;
entangled points provided by entangling inorganic fibers with one another; and
unentangled portions provided from the first principal face to the second principal face, the inorganic fibers being not entangled with one another and being arranged substantially parallel to one another in said unentangled portions.
2. The mat according to claim 1,
wherein at least one of said unentangled portions is provided by penetrating barbless needles to a first sheet which is to be the mat from a first principal face side to a second principal face side or from the second principal face side to the first principal face side.
3. The mat according to claim 1,
wherein said unentangled portions have a formation density of about 0.5 pcscm2 to about 25 pcscm2.
4. The mat according to claim 3,
wherein said unentangled portions have a formation density of about 1 pcscm2 to about 20 pcscm2.
5. The mat according to claim 1, further comprising:
entangled portions provided from said first principal face to said second principal face,
wherein inorganic fibers forming said entangled portions are closely entangled with one another as compared with inorganic fibers forming a portion other than the entangled portions.
6. The mat according to claim 5,
wherein said entangled portions comprise
a first entangled portion which is provided using the inorganic fibers closely entangled with one another while the first entangled portion is oriented from a first principal face side of the mat to a second principal face side, and
a second entangled portion which is provided using the inorganic fibers closely entangled with one another while the second entangled portion is oriented from the second principal face side of the mat to the first principal face side.
7. The mat according to claim 5,
wherein said entangled portions have a formation density of about 0.5 pcscm2 to about 30 pcscm2.
8. The mat according to claim 5,
wherein said unentangled portions and said entangled portions are alternately formed at different positions at least partially.
9. The mat according to claim 1,
wherein said inorganic fibers comprise at least one of an alumina fiber, an alumina-silica fiber, a silica fiber, a soluble fiber, and a glass fiber.
10. The mat according to claim 9,
wherein a composition ratio of the alumina-silica fiber is Al2O3:SiO2 of (about 60:about 40) to (about 80:about 20) in an weight ratio.
11. The mat according to claim 1, further comprising:
an organic binder.
12. The mat according to claim 1, further comprising;
an expansive agent.
13. A method for manufacturing a mat, comprising:
providing entangled points by entangling inorganic fibers with one another; and
penetrating barbless needles to a first sheet including the entangled points from at least a first principal face side of the first sheet to a second principal face side.
14. The method according to claim 13, comprising:
penetrating barb needles to a precursor sheet including the entangled points from at least a first principal face side of the precursor sheet to a second principal face side to manufacture a needling precursor sheet; and
firing said needling precursor sheet to manufacture said first sheet.
15. The method according to claim 14,
wherein said barb needles are penetrated to said precursor sheet from the second principal face side of said precursor sheet to the first principal face side.
16. The method according to claim 13, comprising:
manufacturing a barbless needling sheet through said penetrating step; and
penetrating barb needles to said barbless needling sheet from at least a first principal face side of said barbless needling sheet to a second principal face side.
17. The method according to claim 16,
wherein said barb needles are penetrated to said barbless needling sheet from the second principal face side of said barbless needling sheet to the first principal face side.
18. The method according to claim 14,
wherein a first position where each of said barbless needles penetrates and a second position where each of said barb needles penetrates are alternated and differ from each other at least partially.
19. The method according to claim 13, further comprising:
impregnating a mat with an organic binder solution to manufacture an impregnated mat; and
drying said impregnated mat.
20. The method according to claim 13, further comprising:
producing a second sheet from slurry containing inorganic fibers by a sheet-forming process,
wherein said second sheet is used as said first sheet.
21. An apparatus for purifying exhaust gas comprising:
an exhaust gas treating body;
a casing housing said exhaust gas treating body; and
a holding sealing material placed between said exhaust gas treating body and said casing,
wherein said holding sealing material uses the mat according to claim 1.
22. An apparatus for purifying exhaust gas comprising:
an exhaust gas treating body;
a casing housing said exhaust gas treating body; and
a holding sealing material which is placed between said exhaust gas treating body and said casing and which holds said exhaust gas treating body,
wherein said holding sealing materials uses the mat manufactured by the method according to claim 13.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A mounting pin formed at a pin position on a mounting target and adopted to set the mounting target in a mounted state through pin connection, comprising:
a leg standing upright at the pin position; and
a locking projection formed at a distal end of said leg to project in one direction and capable of locking with a locking projection of another mounting pin through pin connection,
wherein the mounting pins corresponding to each other are set in a pin-connected state by said locking projections when the mounting target is mounted.
2. A pin according to claim 1, wherein said locking projections lock with each other by urging opposing surfaces thereof against each other.
3. A pin according to claim 1, wherein in the pin-connected state, said locking projections are pushed out in directions opposite to projecting directions thereof, thus generating a force that tries to restore said locking projections to initial positions in a non-contact state.
4. A pin according to claim 1, wherein said locking projections that are adjacent are arranged face to face or back to back.
5. A pin according to claim 1, wherein the pin position is shifted toward a rear surface of said locking projection and positioned so that adjacent intervals become equal and minimum.
6. A pin according to claim 1, wherein
said mounting pin further comprises an electrode pad fixed to the mounting target, and
said leg stands upright at the pin position on the electrode pad.
7. A mounting device according to claim 1, comprising
a first mounting target,
a second mounting target to be mounted on said first mounting target, and
a plurality of mounting pins having legs standing upright at pin positions on said first and second mounting targets, and locking projections formed at distal ends of said legs to project in one direction and capable of locking with each other through pin connection,
wherein said mounting pins that correspond to each other are set in a pin-connected state by said locking projections when said first and second mounting targets are mounted.
8. An apparatus according to claim 7, wherein the pin-connected state is canceled by unlocking said locking projections that lock with each other, thereby removing said second mounting target, which has been in a mounted state, from said first mounting target.
9. An apparatus according to claim 7, wherein said mounting pins are arranged in one line along four sides of a rectangle of at least one of said first and second mounting targets to be separated from each other by a distance substantially corresponding to a pin width, such that all meshing lines of said locking projections that lock with each other face the same direction.
10. The apparatus according to claim 7, wherein said mounting pins are arranged in one line along four sides of a rectangle of at least one of said first and second mounting targets to be separated from each other by a distance substantially corresponding to a pin width, such that meshing lines of said locking projections located on adjacent sides are substantially perpendicular.
11. An apparatus according to claim 7, wherein said mounting pins are arranged in one line along four sides of a rectangle of at least one of said first and second mounting targets to be separated from each other by a distance substantially corresponding to a pin width, such that meshing lines of said locking projections that lock with each other are radial.
12. An apparatus according to claim 7, wherein said mounting pins are arranged in one line along four sides of a rectangle of at least one of said first and second mounting targets to be separated from each other by a distance substantially corresponding to a pin width, such that meshing lines of said locking projections that lock with each other draw a circle.
13. An apparatus according to claim 7, wherein said mounting pins are arranged in a matrix on an entire rectangular surface of at least one of said first and second mounting targets to be separated from each other by a distance substantially corresponding to a pin width, such that said locking projections face the same direction while reversing a facing direction for every column.
14. An apparatus according to claim 7, wherein said mounting pins are arranged in a matrix on an entire rectangular surface of at least one of said first and second mounting targets to be separated from each other by a distance substantially corresponding to a pin width, such that said locking projections face the same direction while reversing a facing direction for every row.
15. An apparatus according to claim 7, wherein said mounting pins are arranged on an entire rectangular surface of at least one of said first and second mounting targets to be separated from each other by a distance substantially corresponding to a pin width, such that meshing lines of said locking projections that lock with each other are radial.
16. An apparatus according to claim 7, wherein said mounting pins are arranged on an entire rectangular surface of at least one of said first and second mounting targets to be separated from each other by a distance substantially corresponding to a pin width, such that meshing lines of said locking projections that lock with each other intersect vertically and horizontally.
17. An apparatus according to claim 7, wherein said mounting pins are arranged on an entire rectangular surface of at least one of said first and second mounting targets to be separated from each other by a distance substantially corresponding to a pin width, such that meshing lines of said locking projections that lock with each other draw a plurality of concentric circles.
18. An apparatus according to claim 7, wherein said first mounting target comprises a circuit board and said second mounting target comprises an interposer.
19. A method of manufacturing a mounting pin, comprising the steps of:
forming an electrode pad on a circuit board and applying a photosensitive resist to cover the electrode pad by photolithography,
exposing the photosensitive resist by using a first mask so as to reach the electrode pad, and developing the photosensitive resist,
after development, exposing only a surface of the photosensitive resist by using a second mask with an opening diameter larger than that of the first mask, and developing the exposed surface, thereby forming a hole having two opening diameters, with a diameter of a surface portion thereof being extended in one direction, and
subjecting the hole to electroplating so as to deposit a metal component, and thereafter plating a surface from which the photosensitive resist has been removed, thereby forming a pin main body made of the metal component on the electrode pad.