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A kind of semiconductor device and its manufacturing method and electronic device

A manufacturing method and semiconductor technology, applied in the direction of semiconductor devices, semiconductor/solid-state device manufacturing, electric solid-state devices, etc., can solve problems such as uneven thickness of the tunneling oxide layer, achieve good breakdown voltage, and improve device coupling rate Effect

Active Publication Date: 2018-10-23
SEMICON MFG INT (SHANGHAI) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will result in a severely non-uniform thickness of the tunnel oxide layer, with the thickness of the tunnel oxide layer at the edge of the active region being thinner than that in the middle of the active region

Method used

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  • A kind of semiconductor device and its manufacturing method and electronic device
  • A kind of semiconductor device and its manufacturing method and electronic device
  • A kind of semiconductor device and its manufacturing method and electronic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The following will combine Figures 2A-2G Describe in detail the manufacturing method of the embedded flash memory of the present invention, Figures 2A-2G It is a cross-sectional view of the structure of the memory in the process of fabricating the embedded flash memory according to an embodiment of the present invention.

[0040] like Figure 2A As shown, a semiconductor substrate 200 is provided in which a well is formed.

[0041]The semiconductor substrate may be at least one of the materials mentioned below: silicon, silicon-on-insulator (SOI), silicon-on-insulator (SSOI), silicon-germanium-on-insulator (S-SiGeOI), silicon-on-insulator Silicon germanium (SiGeOI) and germanium on insulator (GeOI), etc. As an example, in this embodiment, single crystal silicon is selected as the constituent material of the semiconductor substrate.

[0042] The semiconductor substrate 200 includes three regions, namely: a first region for forming a logic circuit gate structure, na...

Embodiment 2

[0084] According to the manufacturing method of the present invention, a semiconductor device is also provided, and the semiconductor device includes a floating gate with a T-shaped structure.

[0085] Exemplarily, the bottom width of the floating gate is 50 nm to 75 nm, and the top width of the floating gate is 60 nm to 110 nm.

Embodiment 3

[0087] An embodiment of the present invention provides an electronic device, which includes a semiconductor device. Wherein, the semiconductor device is the semiconductor device described in Embodiment 2, or the semiconductor device manufactured according to the method for manufacturing a semiconductor device described in Embodiment 1.

[0088] The electronic device of this embodiment can be any electronic product or equipment such as mobile phone, tablet computer, notebook computer, netbook, game console, TV set, VCD, DVD, navigator, camera, video recorder, voice recorder, MP3, MP4, PSP, etc. , can also be any intermediate product including semiconductor devices. The electronic device according to the embodiment of the present invention has better performance due to the use of the above-mentioned semiconductor device.

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Abstract

The invention discloses a semiconductor device, a manufacturing method thereof and an electronic device. A hard mask layer is formed on a semiconductor substrate; the hard mask layer and the semiconductor substrate are etched to form a shallow trench; Filling the shallow trench with a layer of isolation material; removing the hard mask layer; forming a tunnel oxide layer on the exposed semiconductor substrate; forming a first floating gate material on the semiconductor substrate layer; perform a planarization process; use an epitaxial growth process to form a second floating gate material layer with a width greater than that of the first floating gate material layer on the first floating gate material layer; in the semiconductor A dielectric layer and a control gate material layer are formed on the substrate in sequence. The fabrication method according to the present invention provides a good process window for the formation of the shallow trench isolation structure oxide layer and floating gate polysilicon.

Description

technical field [0001] The invention relates to a semiconductor manufacturing process, in particular to an embedded flash memory and a manufacturing method thereof. Background technique [0002] Memory is used to store a large amount of digital information. According to recent surveys, memory chips account for about 30% of semiconductor transactions worldwide. Over the years, technological progress and market demand have resulted in more and more high-density various type memory. [0003] Random access memory, such as DRAM and SRAM (static random access memory), has the problem of data loss after power failure during use. To overcome this problem, various nonvolatile memories have been designed and developed. Recently, flash memory based on floating gate concept has become the most general non-volatile memory due to its small cell size and good performance. [0004] Flash memory is FLASH, which has become the mainstream of non-volatile semiconductor storage technology. Am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/28H01L21/762H01L29/423H01L27/11521H10B41/30
Inventor 王新鹏
Owner SEMICON MFG INT (SHANGHAI) CORP
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