Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.
S. V. SAVU1,* , I. D. SAVU1, G. C. BENGA1, I. CIUPITU1
Hybrid US-Laser heating process can be applied to bond wires on pads for electrical and electronics purposes. The process has different versions. This version consists of preheating of the base materials by US vibration followed by simultaneous application of US and laser heat sources. The transferred power of the hybrid system to the surface of the wire was evaluated and the obtained value was around 550 W for the adopted parameters. The transferred power produced partial melting of the base metals (silver and copper) and it produced, in low areas, the eutectic Ag+28.1% Cu. It was examined the structure of the bond and were analyzed the hardness and the electrical resistance of the bond. The microscopic examination revealed the flowing of the base materials as well as the area with mixing in the solid-state of the two base materials. The hardness revealed low susceptibility to cracking. The electrical resistance has been influenced by the specific times (US cleaning time, hybrid process time). Other process parameters bring low significant influence on the electrical resistance of the bond..
Hybrid US-Laser heating process, Electrical connection, Silver wire on copper pad, Susceptibility to cracking, Electrical resistance.
S. V. SAVU, I. D. SAVU, G. C. BENGA, I. CIUPITU, Study of functional characteristics of the hybrid US-laser bonds, Optoelectronics and Advanced Materials - Rapid Communications, 11, 9-10, September-October 2017, pp.580-585 (2017).
Submitted at: Feb. 4, 2017
Accepted at: Oct. 10, 2017
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
Active accounts were imported to the new platform and assigned a random password by default. In order to access your account you need to access the login page and go through the Lost Password dialog (involves the system sending you an email with instructions) in order to reset your password. This step is necessary as passwords are kept in hashed form and the new platform uses modern hashing algorithms incompatible with the previous ones.