Electronic device
An electronic device comprises a target substrate, a micro semiconductor structure array, a conductor array, and a connection layer. The micro semiconductor structure array is disposed on the target substrate. The conductor array corresponds to the micro semiconductor structure array, and electrically connects the micro semiconductor structure array to a pattern circuit of the target substrate. The conductors of the conductor array are independent from one another. Each conductor is an integrated member formed by eutectic bonding a conductive pad of the target substrate and a conductive electrode of the corresponding one of the micro semiconductor structures of the micro semiconductor structure array. The connection layer connects the micro semiconductor structures to the target substrate. The connection layer excludes a conductive material. The connection layer contacts and surrounds the conductors, so that the connection layer and the conductors together form a one-layer structure.
1. An electronic device, comprising:
a target substrate;
a micro semiconductor structure array comprising a plurality of micro semiconductor structures arranged in an array disposed on the target substrate;
a conductor array comprising a plurality of conductors arranged in an array, wherein the conductors are disposed corresponding to the micro semiconductor structures and electrically connecting the micro semiconductor structures to the target substrate, the conductors are independent and individual to one another, each of the conductors is an integrated member formed by eutectic bonding a conductive pad of the target substrate and a conductive electrode of a corresponding one of the micro semiconductor structures, and each of the conductors comprises a first end connecting to the corresponding micro semiconductor structure, a second end connecting to the target substrate, and a peripheral portion connecting to the first end and the second end; and
a connection layer connecting the micro semiconductor structures to the target substrate, wherein the connection layer is nonconductive, the connection layer contacts and surrounds the peripheral portion of each of the conductors, and the connection layer and the conductors together form a one-layer structure,
wherein the connection layer comprises a polymer material, the polymer material is defined with a viscosity-temperature variation characteristic, the polymer material has a first viscosity at a first temperature, a second viscosity at a second temperature, a third viscosity at a third temperature, a fourth viscosity at a fourth temperature, and a fifth viscosity at a fifth temperature, the first temperature to the fifth temperature are increased sequentially, the first temperature is a room temperature, the fifth temperature is a glass transition temperature of the polymer material, the third viscosity and the fifth viscosity are threshold values, the third viscosity is a minimum threshold value, the fifth viscosity is a maximum threshold value, the second viscosity is close to the third viscosity, the conductive pad comprises a first metal, the conductive electrode comprises a second metal, the first metal and the second metal have a eutectic temperature, the eutectic temperature is between the third temperature and the fourth temperature, the fourth temperature is the temperature of starting solidification of the polymer material.
2. The electronic device of claim 1 , wherein each of the conductors is formed by a eutectic bonding of an In—Au alloy system.
3. The electronic device of claim 1 , wherein each of the conductors is formed by a eutectic bonding of an In—Ni alloy system.
4. The electronic device of claim 1 , wherein a polymer material of the connection layer comprises an epoxy material, or an acrylic material.
5. The electronic device of claim 1 , wherein the polymer material of the connection layer has a solidification temperature of 170-220° C.
6. The electronic device of claim 1 , wherein the glass transition temperature is greater than 240° C.