Published online by Cambridge University Press: 15 February 2011
In advanced ULSI devices, Ti (titanium)/TiN (titanium nitride) film stack is commonly used as liner materials. Ti is used to reduce contact/via resistance while TiN is utilized as an adhesion/diffusion barrier layer. Ti/TiN liner with optimized thickness combinations should be used for progressively advanced ULSI devices with features of reduced dimensions and increased aspect ratios in order to effectively reduce contact/via resistance, ensure barrier quality, and maximize cross section of metal conductors with low electrical resistivities. This study evaluates the film properties such as sheet resistance, density, stress, grain structures, and reflectance of individual Ti and TiN, and composite Ti/TiN films manufactured by collimated physical vapor deposition (PVD). The film thickness ranges from 5 to 60nm. The dependence of these properties on the film thickness will be discussed.
To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Dropbox account. Find out more about saving content to Dropbox.
To save this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about saving content to Google Drive.