2019-BTU-web-Vacuum-reflow-Dimock.pdf - 第15页
T rials at the Universal Instruments Advanced Process Lab Mike M eilunas Univ ersal Instruments Arvind Srinivasan Karthikeyan Auburn University • T w o La yer T es t Board • 78x104x1mm • Immer sion Sn and ENIG finis hes …
Equalization
Rate at which the chamber is
returned to atmospheric pressure
0
100
200
300
400
500
600
700
800
Currently no known limitations
Experiments done at ~ 85 Torr/sec
Trials at the Universal Instruments Advanced Process Lab
Mike Meilunas Universal Instruments
Arvind Srinivasan Karthikeyan Auburn University
• Two Layer Test Board
• 78x104x1mm
• Immersion Sn and ENIG finishes
• MLF: 4, 8 and 12mm bodies
• WLCSP: 0.4mm pitch
• LGA: 0.4mm pitch
• SMR: 2512 and 1206
• BGA: 1.0mm pitch
• D2PAK
Trials at the Universal Instruments Advanced Process Lab
Air & Nitrogen
Numerous pastes
SAC 305
Innolot
Tin Lead
Three paste suppliers
Two board finishes
Two pad designs some with vias
Varied Vacuum level
Hold time
We ran
over 200
boards