Handle Substrate, Composite Substrate for Semiconductor, and Semiconductor Circuit Board and Method for Manufacturing the Same

摘要

It is provided a handle substrate of a composite substrate for a semiconductor. The handle substrate is composed of a translucent polycrystalline alumina. A purity of alumina of the translucent polycrystalline alumina is 99.9% or higher, an average of a total forward light transmittance of the translucent polycrystalline alumina is 60% or higher in a wavelength range of 200 to 400 nm, and an average of a linear light transmittance of the translucent polycrystalline alumina is 15% or lower in a wavelength range of 200 to 400 nm.

主权项

1. A handle substrate of a composite substrate for a semiconductor, said handle substrate comprising a translucent polycrystalline alumina:
wherein a purity of alumina of said translucent polycrystalline alumina is 99.9% or higher; wherein an average of a total forward light transmittance of said translucent polycrystalline alumina is 60% or higher in a wavelength range of 200 to 400 nm, and wherein an average of a linear light transmittance of said translucent polycrystalline alumina is 15% or lower in a wavelength range of 200 to 400 nm.