Metal tape material and interconnector for solar module current collection
View Patent ↗A metal tape material contains a metal having face centered cubic lattice structure, in which metal tape material an area fraction A 1 of a preferentially <100>oriented region are within an orientation difference of 15° C. relative to a thickness direction of the metal tape material and further within an orientation difference of 15° C. relative to a first in-plane direction of the metal tape material is 60% or greater and not greater than 100%, and, where an area fraction of a preferentially <212>oriented region are within an orientation difference of 15° relative to the thickness direction and further within an orientation difference of 15° relative to the first in-plane direction is defined as A 2 , the total of the area fraction of the preferentially <212>oriented region and the area fraction of the preferentially <100>oriented region, A 1 +A 2 , is greater than 70% and not greater than 100%.
1. A metal tape material comprising a metal whose crystal structure is face centered cubic lattice structure,
wherein an area fraction A 1 of a <100> oriented region in which crystal axes <100> of a unit lattice of the face centered cubic structure are within an orientation difference of 15° relative to a thickness direction of the metal tape material and further within an orientation difference of 15° relative to a first in-plane direction of the metal tape material is 60% or greater and not greater than 100%, and,
wherein an area fraction of a <212> noriented region in which crystal axes <212>of the unit lattice of the face centered cubic structure are within an orientation difference of 15° relative to the thickness direction of the metal tape material and further within an orientation difference of 15° relative to the first in-plane direction of the metal tape material is defined as A 2 , the total of the area fraction of the <212> oriented region and the area fraction of the <100> oriented region, A 1 +A 2 , is greater than 70% and not greater than 100%,
wherein the crystal grain size of the crystal grains in an in-plane direction of the metal tape material is 400 μm or greater,
wherein the metal is copper, silver, aluminum, or gold,
wherein the area fraction A 1 is not greater than 99.8% and the area fraction A 2 is 0.2% or greater, and
wherein the first direction is the longitudinal direction of the metal tape material.
2. The metal tape material as set out in claim 1 ,
wherein crystal grains constituting the <100> oriented region form at least part of each of a top surface and an under surface of the metal tape material, and
the crystal grains have a structure in which the crystal grains constituting the <212>oriented region are dispersed internally.
3. The metal tape material as set out in claim 1 , wherein the metal is copper of a purity of 99.9% or greater.
4. The metal tape material as set out in claim 1 , wherein the surface is coated with a metal of a melting point of 250 ° C. or less.
5. An interconnector for solar module current collection, comprising:
a metal tape material as set out in claim 1 whose width is 1 mm or greater and not greater than 5 mm and thickness is greater than 50 μm and not greater than 300μm.
6. A metal tape material comprising a metal whose crystal structure is face centered cubic lattice structure,
wherein an area fraction A 1 of a <100> oriented region in which crystal axes <100> of a unit lattice of the face centered cubic structure are within an orientation difference of 15° relative to a thickness direction of the metal tape material and further within an orientation difference of 15° relative to a first in-plane direction of the metal tape material is 60% or greater and not greater than 100%,
wherein an area fraction of a <212> oriented region in which crystal axes <212> of the unit lattice of the face centered cubic structure are within an orientation difference of 15° relative to the thickness direction of the metal tape material and further within an orientation difference of 15° relative to the first in-plane direction of the metal tape material is defined as A 2 , the total of the area fraction of the <212> oriented region and the area fraction of the <100> oriented region, A 1 +A 2 , is greater than 70% and not greater than 100%,
wherein the area fraction A 1 is 65% or greater and not greater than 99.8%, the area fraction A 2 is 0.2% or greater and not greater than 12%,
wherein the metal is copper, silver, aluminum, or gold, and
wherein the first direction is the longitudinal direction of the metal tape material.