Dopant inks, methods of making dopant inks, and methods of using dopant inks

US9359513B1 · kind B1 · utility

Assignee

• Thin Film Electronics ASA · NO

Inventors

• Mao Takashima · Cupertino, US
• Inna Tregub · San Jose, US
• Wenzhuo Guo · Cupertino, US
• Brian Bedwell · Palo Alto, US
• Klaus Kunze · Albuquerque, US
• Aditi Chandra · Los Gatos, US
• Arvind Kamath · Los Altos, US
• Jun Li · Norwood, US
• Li Li · Beijing, CN
• Junfeng Mei · San Jose, US

Key dates

• Filing date: Jun 16, 2014
• Grant date: Jun 7, 2016
• Expiry date: Jun 16, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K71/135
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Printable dopant formulations, methods of making such dopant formulations, and methods of using such dopant formulations are disclosed. The dopant formulations provide a printable dopant ink with a viscosity sufficient to prevent ink spreading when deposited in a pattern on a substrate. Furthermore, an ion exchange purification process provides the dopant formulation with a reduced metal ion concentration, and thus a relatively high purity level. Consequently, the dopant residue remaining on the substrate after curing and/or dopant activation process is relatively uniform, and therefore can be easily removed.