摘要:
A polyimide resin including repeating units represented by formula (1): wherein R is a diamine residue or a diisocyanate residue; m is an integer of 2 to 30; any of silicon atoms bonded to norbornane rings is in exo configuration with respect to the norbornane rings; and any of imide rings bonded to the norbornane rings is in exo configuration with respect to the norbornane rings, and a polyamic acid resin including repeating units represented by formula (2): wherein R is a diamine residue; m is an integer of 2 to 30; any of silicon atoms bonded to norbornane rings is in exo configuration with respect to the norbornane rings; and any of amide groups and carboxyl groups bonded to the norbornane rings is in exo configuration with respect to the norbornane rings. The polyimide resin is soluble in general-purpose solvents, has a good transparency and a high molecular weight, and is excellent in mechanical properties, such as tensile strength and elongation.
摘要:
The invention relates to a tetracarboxylic dianhydride represented by the following formula (1). [In formula (1) R1, R2, R3 and R4 each independently represent an alkyl group having from 1 to 5 carbon atoms, m represents a number from 1 to 30, all of the silicon atoms bonding to the norbornane rings are in an exo-configuration with respect to the norbornane rings, and all of the dicarboxylic anhydride groups bonding to the norbornane rings are in an exo-configuration with respect to the norbornane rings.]
摘要:
A polyimide resin including repeating units represented by formula (1): wherein R is a diamine residue or a diisocyanate residue; m is an integer of 2 to 30; any of silicon atoms bonded to norbornane rings is in exo configuration with respect to the norbornane rings; and any of imide rings bonded to the norbornane rings is in exo configuration with respect to the norbornane rings, and a polyamic acid resin including repeating units represented by formula (2): wherein R is a diamine residue; m is an integer of 2 to 30; any of silicon atoms bonded to norbornane rings is in exo configuration with respect to the norbornane rings; and any of amide groups and carboxyl groups bonded to the norbornane rings is in exo configuration with respect to the norbornane rings. The polyimide resin is soluble in general-purpose solvents, has a good transparency and a high molecular weight, and is excellent in mechanical properties, such as tensile strength and elongation.
摘要:
The invention relates to a tetracarboxylic dianhydride represented by the following formula (1). [In formula (1) R1, R2, R3 and R4 each independently represent an alkyl group having from 1 to 5 carbon atoms, m represents a number from 1 to 30, all of the silicon atoms bonding to the norbornane rings are in an exo-configuration with respect to the norbornane rings, and all of the dicarboxylic anhydride groups bonding to the norbornane rings are in an exo-configuration with respect to the norbornane rings.]
摘要:
A semiconductor chip is attached to a lead frame with a filmy organic die-bonding material having a water absorption of 1.5% by volume or less; having a saturation moisture absorption of 1.0% by volume or less, having a residual volatile component in an amount not more than 3.0% by weight, having a modulus of elasticity of 10 MPa or less at a temperature of 250° C. The semiconductor device thus obtained can be free from occurrence of reflow cracks during reflow soldering for the packaging of semiconductor devices.
摘要:
A semiconductor chip is attached to a lead frame with a filmy organic die-bonding material having a water absorption of 1.5% by volume or less; having a saturation moisture absorption of 1.0% by volume or less, having a residual volatile component in an amount not more than 3.0% by weight, having a modulus of elasticity of 10 MPa or less at a temperature of 250° C. The semiconductor device thus obtained can be free from occurrence of reflow cracks during reflow soldering for the packaging of semiconductor devices.
摘要:
A resin paste for die bonding that can be supplied and applied easily by a printing method. The resin paste for die bonding of the present invention comprises: a polyimide resin (PI), which is obtained by reacting a tetracarboxylic dianhydride (A) comprising a tetracarboxylic dianhydride represented by the formula (I) shown below: (wherein, n represents an integer from 2 to 20), with a diamine (B) comprising a siloxane-based diamine represented by the formula (II) shown below: (wherein, Q1 and Q2 each represent, independently, an alkylene group of 1 to 5 carbon atoms or a phenylene group, Q3, Q4, Q5 and Q6 each represent, independently, an alkyl group of 1 to 5 carbon atoms, a phenyl group, or a phenoxy group, and p represents an integer from 1 to 50); a filler (F); and a printing solvent (S), wherein the resin paste has been adjusted to have a solid fraction from 20 to 70% by weight, a thixotropic index from 1.5 to 8.0, and a viscosity (25° C.) from 5 to 1,000 Pa·s.
摘要:
A semiconductor chip is attached to a lead frame with a filmy organic die-bonding material having a water absorption of 1.5% by volume or less; having a saturation moisture absorption of 1.0% by volume or less, having a residual volatile component in an amount not more than 3.0% by weight, having a modulus of elasticity of 10 MPa or less at a temperature of 250° C. The semiconductor device thus obtained can be free from occurrence of reflow cracks during reflow soldering for the packaging of semiconductor devices.
摘要:
A semiconductor chip is attached to a lead frame with a filmy organic die-bonding material having a water absorption of 1.5% by volume or less; having a saturation moisture absorption of 1.0% by volume or less, having a residual volatile component in an amount not more than 3.0% by weight, having a modulus of elasticity of 10 MPa or less at a temperature of 250° C. The semiconductor device thus obtained can be free from occurrence of reflow cracks during reflow soldering for the packaging of semiconductor devices.
摘要:
Provided are a laminating method and machine for successively heating and compression-bonding a film-shaped organic die-bonding material on a leadframe. leadframe 7 is placed on a travelling table 8 and is heated there. A film-shaped organic die-bonding material 2 is punched out and the resulting film is tack-bonded to a die pad on the leadframe. The leadframe with the film tack-bonded thereon is then moved to a position B by the travelling table. After the film is pressed by a compression-bonding element at the position B, a chip is mounted on the film-shaped organic die-bonding material 2. It is therefore possible to bond a film-shaped organic die-bonding material under compression on a leadframe with good productivity but without voids and further to avoid package cracking upon mounting a chip.