Photo from archive.org
Abstract Copper pastes suitable for low temperature and low pressure die-attach bonding were developed to enable sintering at 275 °C under N2 atmosphere. First, brass flakes were treated with HCl to… Click to show full abstract
Abstract Copper pastes suitable for low temperature and low pressure die-attach bonding were developed to enable sintering at 275 °C under N2 atmosphere. First, brass flakes were treated with HCl to selectively etch Zn and to realize enhanced surface modifications on the flakes. Then, polyethylene glycol was added as binder to the modified flakes due to its reducing effects on copper oxides and its property to prevent agglomeration. Shear strength of ca. 50 MPa was achieved while sintering with 10 MPa bonding pressure thereby providing suitable, easy and low-cost sintering pastes for microelectronics packaging applications.
Journal Title: Journal of Alloys and Compounds
Year Published: 2020
Link to full text (if available)
Share on Social Media: Sign Up to like & get
recommendations!