| 摘要 |
<p>There is disclosed herein a method and apparatus for connecting surface mount components to a substrate, comprising the steps of: (1) providing an electronic assembly which includes solder paste depositions atop mounting pads on a substrate and at least one electronic component having terminations arranged such that each termination rests atop a respective mounting pad; (2) preheating the assembly from a first temperature T1 to a second temperature T2 below the melting point TM of the solder paste; (3) soaking the assembly at substantially the second temperature T2; (4) selectively heating each solder paste deposition to a third temperature T3 above the melting point of the solder paste depositions while maintaining the substrate at substantially the second temperature T2; and (5) cooling the assembly to a fourth temperature T4 below the second temperature T2.</p> |
