A light-emitting device includes: a light-emitting element including a first surface provided as a light extraction surface, a second surface opposite to the first surface, a plurality of third surfaces between the first surface and the second surface, and a positive electrode and a negative electrode at the second surface; a light-transmissive member disposed at the first surface; and a bonding member disposed between the light-emitting element and the light-transmissive member and covering from the first surface to the plurality of third surfaces of the light-emitting element to bond the light-emitting element and the light-transmissive member. The bonding member is made of a resin that contains nanoparticles. The nanoparticles have a particle diameter of 1 nm or more and 30 nm or less and a content of 10 mass % or more and 20 mass % or less.

A light-emitting device includes: a light-emitting element including a first surface provided as a light extraction surface, a second surface opposite to the first surface, a plurality of third surfaces between the first surface and the second surface, and a positive electrode and a negative electrode at the second surface; a light-transmissive member disposed at the first surface; and a bonding member disposed between the light-emitting element and the light-transmissive member and covering from the first surface to the plurality of third surfaces of the light-emitting element to bond the light-emitting element and the light-transmissive member. The bonding member is made of a resin that contains nanoparticles. The nanoparticles have a particle diameter of 1 nm or more and 30 nm or less and a content of 10 mass % or more and 20 mass % or less.

An epoxy resin composition for encapsulating a semiconductor device and a semiconductor device encapsulated by the epoxy resin composition, the composition including a base resin; a filler; a colorant; and a thermochromic pigment, wherein a color of the thermochromic pigment is irreversibly changed when a temperature thereof exceeds a predetermined temperature.

A microelectronic assembly includes a first substrate having a surface and a first conductive element and a second substrate having a surface and a second conductive element. The assembly further includes an electrically conductive alloy mass joined to the first and second conductive elements. First and second materials of the alloy mass each have a melting point lower than a melting point of the alloy. A concentration of the first material varies in concentration from a relatively higher amount at a location disposed toward the first conductive element to a relatively lower amount toward the second conductive element, and a concentration of the second material varies in concentration from a relatively higher amount at a location disposed toward the second conductive element to a relatively lower amount toward the first conductive element.

A microelectronic assembly includes a first substrate having a surface and a first conductive element and a second substrate having a surface and a second conductive element. The assembly further includes an electrically conductive alloy mass joined to the first and second conductive elements. First and second materials of the alloy mass each have a melting point lower than a melting point of the alloy. A concentration of the first material varies in concentration from a relatively higher amount at a location disposed toward the first conductive element to a relatively lower amount toward the second conductive element, and a concentration of the second material varies in concentration from a relatively higher amount at a location disposed toward the second conductive element to a relatively lower amount toward the first conductive element.

A light-emitting device includes: a light-emitting element including a first surface provided as a light extraction surface, a second surface opposite to the first surface, a plurality of third surfaces between the first surface and the second surface, and a positive electrode and a negative electrode at the second surface; a light-transmissive member disposed at the first surface; and a bonding member disposed between the light-emitting element and the light-transmissive member and covering from the first surface to the plurality of third surfaces of the light-emitting element to bond the light-emitting element and the light-transmissive member. The bonding member is made of a resin that contains nanoparticles. The nanoparticles have a particle diameter of 1 nm or more and 30 nm or less and a content of 10 mass % or more and 20 mass % or less.

A light-emitting device includes: a light-emitting element including a first surface provided as a light extraction surface, a second surface opposite to the first surface, a plurality of third surfaces between the first surface and the second surface, and a positive electrode and a negative electrode at the second surface; a light-transmissive member disposed at the first surface; and a bonding member disposed between the light-emitting element and the light-transmissive member and covering from the first surface to the plurality of third surfaces of the light-emitting element to bond the light-emitting element and the light-transmissive member. The bonding member is made of a resin that contains nanoparticles. The nanoparticles have a particle diameter of 1 nm or more and 30 nm or less and a content of 10 mass % or more and 20 mass % or less.

A microelectronic assembly includes a first substrate having a surface and a first conductive element and a second substrate having a surface and a second conductive element. The assembly further includes an electrically conductive alloy mass joined to the first and second conductive elements. First and second materials of the alloy mass each have a melting point lower than a melting point of the alloy. A concentration of the first material varies in concentration from a relatively higher amount at a location disposed toward the first conductive element to a relatively lower amount toward the second conductive element, and a concentration of the second material varies in concentration from a relatively higher amount at a location disposed toward the second conductive element to a relatively lower amount toward the first conductive element.

A microelectronic assembly includes a first substrate having a surface and a first conductive element and a second substrate having a surface and a second conductive element. The assembly further includes an electrically conductive alloy mass joined to the first and second conductive elements. First and second materials of the alloy mass each have a melting point lower than a melting point of the alloy. A concentration of the first material varies in concentration from a relatively higher amount at a location disposed toward the first conductive element to a relatively lower amount toward the second conductive element, and a concentration of the second material varies in concentration from a relatively higher amount at a location disposed toward the second conductive element to a relatively lower amount toward the first conductive element.

Produced is a metal ball which suppresses an emitted dose. Contained are the steps of melting a pure metal by heating the pure metal at a temperature which is higher than a boiling point of an impurity to be removed, higher than a melting point of the pure metal, and lower than a boiling point of the pure metal, the pure metal containing a U content of 5 ppb or less, a Th content of 5 ppb or less, purity of 99.9% or more and 99.995% or less, and a Pb or Bi content or a total content of Pb and Bi of 1 ppm or more, and the pure metal having the boiling point higher than the boiling point at atmospheric pressure of the impurity to be removed; and sphering the molten pure metal in a ball.