1. A positive photosensitive resin composition comprising at least:
(A) a resin containing a constituent unit represented by following formula (1) having an acid-dissociable group, and a constituent unit having a functional group capable of reacting with a carboxyl group to form a covalent bond,
wherein R1 represents a hydrogen atom, a methyl group, a halogen atom or a cyano group;
each of R2 and R3 independently represents a hydrogen atom, a linear or branched alkyl group, or a cycloalkyl group, provided that at least one of R2 and R3 represents a linear or branched alkyl group or a cycloalkyl group;
R4 represents a linear or branched alkyl group that may be substituted, a cycloalkyl group that may be substituted, or an aralkyl group that may be substituted; and
R2 or R3 may combine with R4 to form a cyclic ether,
wherein the constituent unit having a functional group capable of reacting with a carboxyl group to form a covalent bond is a constituent unit which is formed using a radical polymerizable monomer represented by following formula (3) or (5),
in formulae (3) or (5), X represents a divalent organic group which is \u2014O\u2014, \u2014S\u2014, \u2014COO\u2014 or \u2014OCH2COO\u2014,
R7 represents a hydrogen atom, a methyl group or a halogen atom,
each of R8 to R10 and R13 to R15 independently represents a hydrogen atom or an alkyl group,
n is an integer of 1 to 10,
the resin being alkali-insoluble or sparingly alkali-soluble and becoming alkali-soluble when the acid-dissociable group dissociates; and
(B) a compound capable of generating an acid upon irradiation with an actinic ray or radiation,
wherein the component (B) is a compound containing an oxime sulfonate group.
2. The positive photosensitive resin composition according to claim 1,
wherein the component (B) is a compound containing a partial structure represented by formula (2):
wherein R5 represents a linear or branched alkyl group that may be substituted, a cycloalkyl group that may be substituted, or an aryl group that may be substituted.
3. The positive photosensitive resin composition according to claim 1,
wherein the component (B) is a compound represented by following formula (3):
wherein R5 is the same as R5 in formula (2);
X represents a linear or branched alkyl group, an alkoxy group or a halogen atom;
m represents an integer of 0 to 3; and
when m is 2 or 3, each X may be the same as or different from every other X.
4. The positive photosensitive resin composition according to claim 1, which further comprises: (C) an adhesion aid.
5. A method for forming a cured film, comprising:
a step of coating and drying the positive photosensitive resin composition according to claim 1 on a substrate to form a coating;
a step of exposing the coating to an actinic ray or radiation through a mask;
a step of developing the exposed coating with an alkali developer to form a pattern; and
a step of heat-treating the obtained pattern.
6. The method for forming a cured film according to claim 5, which further comprises:
a step of exposing an entire surface of the obtained pattern after the step of developing the exposed coating with an alkali developer to foam a pattern but before the step of heat-treating the obtained pattern.
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 keyboard device for a keyboard instrument, comprising:
a plurality of chassis arranged side by side in a left-right direction;
a plurality of keys pivotally supported by said chassis;
a plurality of hammers pivotally supported by said chassis, for each being pivotally moved in accordance with depression of an associated one of said keys; and
a plurality of guides formed in said chassis and each having a pair of left and right sidewalls which are opposed to an associated one of said hammers from opposite sides, for restricting lateral motion of the associated one of said hammers,
wherein out of said plurality of guides, one at a boundary of each adjacent two of said chassis has said pair of left and right sidewalls formed by an end sidewall of one of said adjacent two chassis and an end sidewall of the other of said adjacent two chassis.
2. A keyboard device as claimed in claim 1, wherein said plurality of chassis include a plurality of chassis which are identical to each other and each provided as a unit for one octave.
3. A keyboard device as claimed in claim 1, wherein said guides are integrally formed with said chassis.
4. A keyboard device as claimed in claim 2, wherein said guides are integrally formed with said chassis.
5. A keyboard device as claimed in claim 3, wherein said chassis are formed by molded articles of a synthetic resin.
6. A keyboard device as claimed in claim 4, wherein said chassis are formed by molded articles of a synthetic resin.
7. A keyboard device for a keyboard instrument, comprising:
a plurality of chassis arranged side by side in a left-right direction;
a plurality of keys pivotally supported by said chassis;
a plurality of hammers arranged side by side in the left-right direction, and pivotally supported by said chassis, for being pivotally moved in accordance with depression of an associated one of said keys; and
a plurality of sidewalls formed in said chassis such that said sidewalls are arranged side by side in the left-right direction at predetermined spaced intervals, each adjacent two of said sidewalls restricting lateral motion of an associated one of said hammers,
wherein at least one of said plurality of sidewalls is removed from each of said chassis, and
wherein said each chassis has a rib mounted therein such that said rib extends in a front-rear direction through a location where said at least one of said plurality of sidewalls is removed, for reinforcing said each chassis as well as for cooperating with two of said sidewalls located leftward and rightward of said rib to restrict lateral motion of an associated one of said hammers.
8. A keyboard device as claimed in claim 7, wherein said chassis are formed by molded articles of a synthetic resin, with which said plurality of sidewalls are integrally formed, and said rib is formed of a metal.
9. A keyboard device as claimed in claim 8, wherein each of said sidewalls has left and right side surfaces thereof integrally formed with respective guide protrusions extending vertically, and said rib has guide protrusion members attached to left and right side surfaces thereof at respective locations corresponding to said guide protrusions, said guide protrusion members being formed of a synthetic resin and extending vertically.
10. A keyboard device as claimed in claim 7, wherein said plurality of chassis include a plurality of basic chassis which are identical to each other and each provided as a unit for one octave, and wherein said rib is mounted at a predetermined identical location of each of said plurality of basic chassis.
11. A keyboard device as claimed in claim 8, wherein said plurality of chassis include a plurality of basic chassis which are identical to each other and each provided as a unit for one octave, and wherein said ribs are attached, respectively, to said plurality of basic chassis at respective predetermined identical locations.
12. A keyboard device as claimed in claim 9, wherein said plurality of chassis include a plurality of basic chassis which are identical to each other and each provided as a unit for one octave, and wherein said ribs are attached, respectively, to said plurality of basic chassis at respective predetermined identical locations.