Method for manufacturing polyimide metal laminate
View Patent ↗A method for manufacturing a polyimide-metal laminate including forming a polyimide film, in which at least surfaces of both sides of the film are formed by thermally fusion-bondable polyimide layers (a), and thermal compression-bonding metal layers on both sides of the polyimide film; in which forming the polyimide film includes reacting a tetracarboxylic dianhydride component with a diamine component containing a diamine compound represented by general formula (1) to give a solution of a polyamic acid (a), forming a self-supporting film from the solution of the polyamic acid (a) and imidizing the self-supporting film by heating at a maximum heating temperature of 440° C. or lower to form the polyimide layer (a); in which R 1 represents hydrogen or alkyl or aryl having 1 to 12 carbon atoms; and R 2 represents hydrogen or alkyl or aryl having 1 to 12 carbon atoms.
1. A method for manufacturing a polyimide-metal laminate, comprising:
forming a polyimide film, in which at least surfaces of both sides of the film are formed by polyimide layers (a), and;
thermal compression-bonding metal layers on both sides of the polyimide film,
wherein forming the polyimide film comprises:
reacting a tetracarboxylic dianhydride component with a diamine component containing a diamine compound represented by general formula (1) to give a solution of a polyamic acid (a),
forming a self-supporting film from the solution of the polyamic acid (a) on a support, and
imidizing the self-supporting film by heating at a maximum heating temperature of 440° C. or lower after the self-supporting film is peeled from the support to form the polyimide layer (a);
wherein R 1 represents hydrogen or alkyl or aryl having 1 to 12 carbon atoms; and R 2 represents hydrogen or alkyl or aryl having 1 to 12 carbon atoms.
2. The method for manufacturing a polyimide-metal laminate according to claim 1 , wherein after forming the self-supporting film from the solution of the polyamic acid (a), the film is imidized by heating at a maximum heating temperature of 320 to 370° C. to form the polyimide layer (a).
3. The method for manufacturing a polyimide-metal laminate according to claim 1 ,
wherein the polyimide film has a single layer structure of the polyimide layer (a), and
wherein forming the polyimide film comprises:
forming a self-supporting film from the solution of the polyamic acid (a) on a support, and then
imidizing by heating at a maximum heating temperature of 440° C. or lower after the self-supporting film is peeled from the support, to form the polyimide film having a single layer structure of the polyimide layer (a).
4. The method for manufacturing a polyimide-metal laminate according to claim 1 ,
wherein the polyimide film has a multilayer structure having the polyimide layers (a) and another polyimide layer (b), and
the polyimide layers (a) are disposed on both outermost sides of the multilayer structure, and the polyimide layer (b) is disposed in inner part of the multilayer structure, and
wherein the step of forming the polyimide film comprises:
forming a multilayer liquid film on a support, wherein the multilayer liquid film has at least three layers from the solution of the polyamic acid (a) and a solution of a polyamic acid (b) for forming the polyimide layer (b) such that at least the solution of the polyamic acid (a) forms the uppermost and the bottom layers, and
forming a self-supporting film from the multilayer liquid film formed on the support, and then
imidizing by heating at a maximum heating temperature of 440° C. or lower after the self-supporting film is peeled from the support to form the polyimide layers (a) and the polyimide layer (b).
5. The method for manufacturing a polyimide-metal laminate according to claim 1 ,
wherein the polyimide film has a multilayer structure having the polyimide layers (a) and another polyimide layer (b), and
the polyimide layers (a) are disposed on both outermost sides of the multilayer structure, and the polyimide layer (b) is disposed in inner part of the multilayer structure, and
wherein forming the polyimide film comprises:
applying the solution of the polyamic acid (a) to both sides of a self-supporting film produced on a support from a solution of a polyamic acid (b) for forming the polyimide layer (b) after the self-supporting film is peeled from the support, and
drying to form a self-supporting film having a multilayer structure, and then
imidizing by heating at a maximum heating temperature of 440° C. or lower to form the polyimide layers (a) and the polyimide layer (b).
6. The method for manufacturing a polyimide-metal laminate according to claim 1 , wherein the diamine compound represented by general formula (1) is 2,4-bis(4-aminoanilino)-6-anilino-1,3,5-triazine.
7. The method for manufacturing a polyimide-metal laminate according to claim 1 , wherein the diamine component comprises a diamine compound represented by general formula (1) in the range of 5 to 100 mol %.
8. The method for manufacturing a polyimide-metal laminate according to claim 1 , wherein the diamine component comprises a diamine compound represented by general formula (1) in the range of 25 to 100 mol %.
9. The method for manufacturing a polyimide-metal laminate according to claim 1 , wherein the diamine component further comprises at least one compound selected from para-phenylenediamine and 4,4′-diaminodiphenyl ether.
10. The method for manufacturing a polyimide-metal laminate according to claim 1 , wherein the tetracarboxylic dianhydride component comprises at least one compound selected from 3,3′,4,4′-biphenyltetracarboxylic dianhydride and pyromellitic dianhydride.