Provided is a positive electrode material including a first solid electrolyte, a positive electrode active material, and a coating material at least partially coating a surface of the positive electrode active material. The first solid electrolyte is represented by the following compositional formula (1): Li.sub.aM.sub.bX.sub.c. In the compositional formula (1), a, b, and c are positive real numbers and satisfy a mathematical expression: a+b<c; M is at least one selected from the group consisting of metallic elements excluding Li and metalloid elements; and X is at least one selected from the group consisting of F, Cl, Br, and I. The coating material includes an oxoacid salt of a non-metal or metalloid cation.

A solid electrolyte ceramic material that includes sintered solid electrolyte particles containing, at least, lithium (Li), lanthanum (La), bismuth (Bi), and oxygen (O), wherein the Bi is at a higher concentration in a vicinity of a grain boundary of the sintered solid electrolyte particles than in a grain interior of the sintered solid electrolyte particles.

The transparent conductive layer (3) includes a first main surface (5), and a second main surface (6) opposed to the first main surface (5) in a thickness direction. The transparent conductive layer (3) has a first grain boundary (7) in which two end edges (23) in a cross-sectional view are both opened to the first main surface (5) and an intermediate region (25) between the end edges (23) is not in contact with the second main surface (6); and a first crystal grain (31) partitioned by the first grain boundary (7) and facing only the first main surface (5). The transparent conductive layer (3) contains rare gas atoms having a higher atomic number than argon atoms.

The transparent conductive layer (3) includes a first main surface (5), and a second main surface (6) opposed to the first main surface (5) in a thickness direction. The transparent conductive layer (3) has a first grain boundary (7) in which two end edges (23) in a cross-sectional view are both opened to the first main surface (5) and an intermediate region (25) between the end edges (23) is not in contact with the second main surface (6); and a first crystal grain (31) partitioned by the first grain boundary (7) and facing only the first main surface (5). The transparent conductive layer (3) contains rare gas atoms having a higher atomic number than argon atoms.

A light-transmitting electroconductive film (20) according to the present invention includes a region containing krypton at a content ratio of less than 0.1 atomic % at least partially in a thickness direction (D) of the light-transmitting electroconductive film (20). A transparent electroconductive film (X) according to the present invention includes a transparent substrate (10); and the light-transmitting electroconductive film (20) disposed on one surface side in the thickness direction (D) of the transparent substrate.

An oxide ion conductor has a X.sub.3Z.sub.2(TO.sub.4).sub.3 structure, where X is a divalent metal element, Z is a trivalent metal element, and T is a tetravalent metal element, and has a composition expressed by (X.sub.1-xA.sub.x).sub.3(Z.sub.1-yB.sub.y).sub.2(T.sub.1-zC.sub.z).sub.3O.sub.12+δ where the element X is Ca, Fe, Gd, Ba, Sr, Mn, and/or Mg, the element Z is Al, Cr, Fe, Mn, V, Ga, Co, Ni, Ru, Rh, and/or Ir, the element T is Si and/or Ge, an element A is La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and/or Sr, an element B is Zn, Mn, Co, Ru, and/or Rh, and an element C is Si, Al, Ga, and/or Sn, 0≤x≤0.2, 0≤y≤0.2, and 0≤z≤0.2 are satisfied, and δ is a value securing electrical neutrality.

A ceramic powder material containing: a first garnet-type compound containing Li, La, and Zr; and a second garnet-type compound containing Li, La, and Zr and having a composition different from a composition of the first garnet-type compound, in which the first garnet-type compound and the second garnet-type compound are represented by Formula [1] Li.sub.7-(3x+y)M1.sub.xLa.sub.3Zr.sub.2-yM2.sub.yO.sub.12, where M1 is Al or Ga, M2 is Nb or Ta, the first garnet-type compound satisfies 0≤(3x+y)≤0.5, and the second garnet-type compound satisfies 0.5<(3x+y)≤1.5.

A conducting structure is provided and includes a first layer; a first terminal on the first layer; a second layer overlapping the first layer via the first terminal; a second terminal on the second layer; a first hole which penetrates the second layer and the second terminal; an organic insulating layer located between the first terminal and the second layer, and having a second hole connected to the first hole; and a connecting material provided in the first and second holes to electrically connect the first terminal and the second terminal to each other, wherein a diameter of the second hole is greater than a diameter of the first hole.

A conducting structure is provided and includes a first layer; a first terminal on the first layer; a second layer overlapping the first layer via the first terminal; a second terminal on the second layer; a first hole which penetrates the second layer and the second terminal; an organic insulating layer located between the first terminal and the second layer, and having a second hole connected to the first hole; and a connecting material provided in the first and second holes to electrically connect the first terminal and the second terminal to each other, wherein a diameter of the second hole is greater than a diameter of the first hole.

There is provided an inorganic solid electrolyte-containing composition containing an inorganic solid electrolyte and a polymer binder, in which the polymer binder contains a specific polymer, and the weight-average molecular weight and content of the polymer binder satisfy relationships represented by specific expressions. There are also provided a sheet for an all-solid state secondary battery and an all-solid state secondary battery, in which this inorganic solid electrolyte-containing composition is used, and manufacturing methods for a sheet for an all-solid state secondary battery, and an all-solid state secondary battery.