Pulsed and Pulsed Bias Sputtering: Principles and Applications - Hardcover

Barnat, Edward V.; Lu, Toh-Ming

Hardcover

ISBN 10: 140207543X ISBN 13: 9781402075438

Publisher: Springer, 2003

Synopsis

Diffusion Barrier Stack - 5 nm -3 nm -2 nm :. . . -. . . . : . . O. 21-lm Figure 2: Schematic representing a cross-sectional view of the topography that is encountered in the processing of integrated circuits. (Not to scale) these sub-micron sized features is depicted in Fig. 2. The role of the diffusion barrier is to prevent the diffusion of metallic ions into the interlayer dielectric (lLD). Depending on the technology, in particular the choice of the ILD and the metal interconnect, the diffusion barrier may be Ti, Ta, TiN, TaN, or a multi-layered structure of these materials. The adhesion of the barrier to the dielectric, the conformality of the barrier to the feature, the physical structure of the film, and the chemical composition of the film are key issues that are determined in part by the nature of the deposition process. Likewise, after the growth of the barrier, a conducting layer (the seed layer) is needed for subsequent filling of the trench by electrochemical deposition. Again, the growth process must be able to deposit a film that is continuous along the topography of the sub-micron sized features. Other factors of concern are the purity and the texture of the seed layer, as both of these factors influence the final resistivity of the metallic interconnect. Sputter-deposited coatings are also commonly employed for their electro-optical properties. For example, an electrochromic glazing is used to control the flux of light that is transmitted through a glazed material.

About this title

Synopsis

This book provides basic knowledge on the design of the instrumentation for pulsed and pulsed bias sputtering techniques as well as the knowledge for the control of thin film properties using the deposition parameters such as pulsing cycle and duty. The book focuses on the basic principles and experimentation of the pulsed and pulsed bias sputter deposition of thin films. The transient charging characteristics of the target in the DC reactive sputtering of insulator films and of the insulating substrate in the DC sputtering of metal films without the pulsing are discussed in detail. The predictions and experimentation of the discharging (neutralization) strategies using pulsing potentials are presented. Examples are given on the growth of thin films using these strategies and on the relationship between the film properties the pulsing parameters. In addition, the book also presents in a coherent manner the basic physics of DC plasma formation and the utilization of the plasma in the sputtering environment. The book will not only be useful for academic researchers but also for industrial scientists interested in sputter coating of high quality metal and insulating films.

Edition details

• Publisher: Springer
• Publication date: 2003
• Language: English
• ISBN 10: 140207543X
• ISBN 13: 9781402075438
• Binding: Hardcover
• Number of pages: 168