14
2023
-
04
Nucleation Method for Diamond Coatings
Author:
Currently, the prevailing method for preparing diamond coatings is microwave plasma chemical vapor deposition (MPCVD). During MPCVD‑based diamond film growth, nucleation plays a crucial role in ensuring high‑quality film formation. In the nucleation process, active plasma species tend to adsorb and accumulate at sites with high surface energy on the diamond substrate; when the cluster size reaches a critical threshold, stable nuclei form.
Nucleation Method for Diamond Coatings
Currently, the prevailing method for preparing diamond coatings is microwave plasma chemical vapor deposition (MPCVD). During MPCVD‑based diamond film growth, nucleation plays a crucial role in ensuring high‑quality film formation. In the nucleation process, active plasma species tend to adsorb and accumulate at sites with high surface energy on the diamond substrate; when the cluster size reaches a critical threshold, stable nuclei form.
First, the substrate must undergo pre‑treatment. This is because a smooth substrate surface has too low a surface energy, which hinders the adsorption of active species and makes nucleation difficult; as a result, the deposited diamond film exhibits an island‑like morphology and poor film quality. The purpose of substrate pre‑treatment is to enhance the uniformity and compactness of nucleation, thereby improving the quality of the diamond film. Currently, the most commonly employed nucleation methods include surface‑damage‑induced defect formation, the use of transition layers, and bias‑assisted nucleation.
The surface‑damage defect method is a commonly used nucleation technique that reduces the surface nucleation barrier through surface damage, enabling the adsorption and stacking of active plasma species and thereby enhancing nucleation density and film quality.
The transition-layer approach is typically employed in two scenarios: first, when the thermal expansion coefficients of the substrate and the diamond film differ significantly, resulting in poor adhesion between them; in such cases, a material with a thermal expansion coefficient intermediate to those of the substrate and the diamond film—while also promoting diamond‑film growth—is selected as the transition layer, thereby enhancing the bonding strength between the diamond film and the substrate. Second, when the substrate contains elements that inhibit the formation of the diamond phase, the transition layer serves as a barrier, preventing the diffusion of these elements and creating favorable conditions for diamond‑film growth.
The negative-bias nucleation method reduces the nucleation energy barrier by applying a negative bias to the substrate, thereby increasing both the nucleation rate and density.
Diamond coating
Previous page
Next page
Previous page
Next page
Related News
From September 9 to 11, the 27th China International Optoelectronic Exposition (CIOE 2026) was grandly held.
From July 15 to 17, the 14th Western Global Semiconductor Expo (CWICE 2026) was held at the Chengdu Century City New International Convention and Exhibition Center. As a leading domestic player in MPCVD (Microwave Plasma Chemical Vapor Deposition) equipment and high-quality diamond materials, UPL (Youpulai) showcased its proprietary MPCVD systems and premium diamond substrates at the event.
From June 10 to 12, the 2026 Future Industry New Materials Expo (FINE 2026) was held at the Shanghai New International Expo Centre. At the event, UPL made a prominent appearance, presenting its MPCVD (Microwave Plasma Chemical Vapor Deposition) systems alongside comprehensive diamond material solutions for diverse application scenarios. The company engaged with industry peers and downstream customers to explore the innovative uses and future trajectory of diamond in the semiconductor sector.
On April 16–17, the 2026 (Second) Future Semiconductor Industry Innovation Conference was grandly held at Yinsan Lake in Suzhou.
On March 18–19, the 2026 Second Symposium on Fourth-Generation Semiconductor Technology was grandly held in Hangzhou. As a leading enterprise in China’s MPCVD equipment and diamond materials sectors, Uniplasma showcased its core products and technical solutions at the conference, engaging in in-depth exchanges with industry peers and jointly discussing the future of the sector.
On February 28, the unveiling ceremony of Henan Fengyouchuang Materials Technology Co., Ltd. (hereinafter referred to as Henan Fengyouchuang), a joint venture established by Shenzhen Uniplasma and Huanghe Xuanfeng, was solemnly held in Xuchang. Attending the ceremony were Yang Zengjun, Party Secretary and Chairman of the Xuchang Municipal Investment Group; Quan Feng, Chairman of Shenzhen Uniplasma; Chai Bohao, Deputy General Manager of Shenzhen Uniplasma; Du Ping, Deputy Director of the Henan Branch of the China Development Bank; Li Ge, Chairman of Huanghe Xuanfeng; Pang Wenlong, General Manager of Huanghe Xuanfeng, along with other leaders.
New Materials, New Future | Uniplasma showcases at the Carbontech 2025 Carbon Materials Exhibition
On December 11, the 9th International Carbon Materials Conference and Industry Exhibition, Carbontech 2025, concluded successfully at the Shanghai New International Expo Center. At the event, Uniplasma made a prominent appearance with its core technologies and products, bringing together industry peers to discuss new directions and a promising future for the diamond industry.
On November 16, the 27th China Hi-Tech Fair and the Asia Semiconductor and Integrated Circuit Industry Exhibition concluded successfully at the Shenzhen (Bao’an) International Convention and Exhibition Center. At the event, Uniplasma showcased its MPCVD equipment and diamond material products, offering a “core” solution to address the semiconductor industry’s “thermal management crisis” and injecting “core” momentum.
Follow us
Follow the public account
Tel：
Email：
在线客服添加返回顶部
右侧在线客服样式 1,2,3 3
图片alt标题设置： Shenzhen Uniplasma Technology Co., Ltd.
表单验证提示文本： Content cannot be empty!
循环体没有内容时： Sorry, no matching items were found.
CSS / JS 文件放置地