Light-Emitting Element Bonding Structure to Prevent Sidewall Shorting

The patent applies preliminary action by forming the second type semiconductor portion laterally on the first type semiconductor portion before the bonding process. This pre-formed structure creates a barrier that prevents the bonding material from going up along the side surfaces during bonding, thereby preventing short circuits and bonding failures while maintaining the heat dissipation benefits of junction-down mounting.

The second type semiconductor portion acts as an intermediary structure between the first type semiconductor portion and the bonding material. It serves as a physical barrier that mediates the interaction between the bonding material and the side surfaces of the first type semiconductor portion, preventing the bonding material from creeping up and causing short circuits while allowing heat to dissipate effectively.

The second type semiconductor portion is formed in advance on the first type semiconductor portion to create a controlled structure. This preliminary formation ensures that the bonding material has a defined path and barrier, preventing it from going up along the side surfaces of the first type semiconductor portion while maintaining adequate bonding coverage through proper positioning.

The patent applies local quality by creating a specific structure (second type semiconductor portion) at a particular location (on the first type semiconductor portion) to achieve different functional properties in different areas. The second type semiconductor portion provides insulation and structural support locally, preventing bonding material creep in critical areas while allowing bonding coverage in appropriate regions.

The patent merges the formation of the second type semiconductor portion with the existing semiconductor layer structure during the epitaxial growth process. By integrating this additional layer into the standard manufacturing flow rather than adding it as a separate post-processing step, the manufacturing complexity is minimized while achieving the desired height differential that improves transfer yield.

The patent utilizes parameter changes in the epitaxial growth process to control the thickness and positioning of the second type semiconductor portion. By adjusting growth parameters such as temperature, pressure, and precursor flow rates, the desired height relationship between the first type semiconductor portion and the active portion is achieved, improving transfer yield without significantly increasing manufacturing complexity.