Carrier channel with element concentration gradient distribution and fabrication method thereof

Abstract

The present disclosure provides a carrier channel with an element concentration gradient distribution. The carrier channel includes a substrate and a carrier channel structure. The carrier channel structure is stacked on the substrate, wherein a ratio of a height and a width of the carrier channel is greater than 1, and the carrier channel is crystallized from the contact surface by a rapid melting growth process, thus the carrier channel structure has the element concentration gradient distribution.

Description

RELATED APPLICATIONS[0001]This application claims priority to Taiwan Application Serial Number 103116982, filed May 14, 2014, which is herein incorporated by reference.BACKGROUND[0002]1. Technical Field[0003]The present disclosure relates to a carrier channel and a fabricating method thereof. More particularly, the present disclosure relates to a carrier channel with an element concentration gradient distribution and a fabricating method thereof.[0004]2. Description of Related Art[0005]In semiconductor devices, the carrier concentration in the active region would affect the performance of the device. How to control the carrier concentration and the carrier location precisely is a concerned issue in the semiconductor industry.[0006]In the semiconductor industry, the thermal diffusion process and the ion implantation process have been widely used to control the carrier concentration and the carrier distribution. The thermal diffusion process promoted the carrier moving from high conce...

AI Technical Summary

Benefits of technology

The present patent provides a way to create a carrier channel with a gradual concentration of elements. This is done by depositing layers of different compositions and then using a photolithographic process to create a pattern in the top layer. This pattern is then transferred to the layers below using a selective etching process. The result is a carrier channel with the desired element concentration gradient distribution. This method can allow for the creation of highly organized structures with controlled element concentration, which can be useful in various applications such as electronics and sensors.

Problems solved by technology

How to control the carrier concentration and the carrier location precisely is a concerned issue in the semiconductor industry.

But the thermal diffusion process consumes amount of time and energy, and it would increase the thermal budget and the production costs of the device significantly.

Furthermore, the thermal diffusion process is only applied to the shallow area of the device.

Because the carriers acceleration by the electric field has strong energy, the carriers would damage the surface lattice of the device and generate form a lattice defect.

Although the lattice defect can be repaired by executing an annealing process after the ion implantation process, but the annealing process increases the production costs of the device.

However, the high temperature annealing process always increases the production costs.

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