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US 9,591,768 B2Granted
Adhesive agent having a polyimide and acid modified rosin
AssigneeToray Industries, Inc.
InventorsKoichi Fujimaru, Toshihisa Nonaka
Life of this patent
Estimating the term…
Abstract
The present invention relates to an adhesive agent which can be used in the mounting of a semiconductor chip on a circuit board or the like. The present invention addresses the problem of providing an adhesive agent having both excellent storage stability and excellent connection reliability. A means for solving the problem is an adhesive agent comprising (a) a polyamide, (b) an epoxy compound and (c) an acid-modified rosin.
Claims8
An adhesive agent film which comprises an adhesive agent comprising:
- a polyimide (a), an epoxy compound (b), and an acid-modified rosin (c),
- wherein the polyimide (a) is a polymer having a structure represented by a general formula (2) or a general formula (3) and containing a structure represented by a general formula (1) as R4 in the general formula (2) or the general formula (3) in an amount of 5 to 15% by mass with respect to the total amount of the polymer:
- in which R1s represent a divalent hydrocarbon group, and may be the same or different in one molecule and may be the same or different in different molecules, R2s represent a monovalent hydrocarbon group, and may be the same or different in one molecule and may be the same or different in different molecules, and n is an integer of 1 to 10;
- in which R3s are a 4- to 14-valent organic group, and may be the same or different in one molecule and may be the same or different in different molecules;
- R4s are a 2- to 12-valent organic group, and may be the same or different in one molecule and may be the same or different in different molecules;
- at least one of R3 and R4 is an aromatic group containing at least one of one or more groups selected from the group consisting of a 1,1,1,3,3,3-hexafluoropropyl group, an isopropyl group, an ether group, a thioether group, and a SO2 group;
- R5s and R6s represent one or more groups selected from the group consisting of a phenolic hydroxyl group, a sulfonic acid group, and a thiol group, and may be the same or different in one molecule and may be the same or different in different molecules;
- X represents a monovalent organic group;
- m represents an integer of 8 to 200;
- α and β are each an integer of 0 to 10, and α+β is an integer of 0 to 10;
- and in which α+β is 1 to 10 in 20 to 90% of repeating units whose number is represented by m,
- wherein a minimum melt viscosity after stored for one month under an environment of 23° C. and 55% in relative humidity (RH) is 100 to 10000 Pa·s.
9 more elements
Dependencies are inferred from the claim text.