Patent ID: 7874474
Filing Date: 2011-01-25
Classification: B23K,H01L,H05K,Y02P

Abstract:
1. A method of fluidic self assembly comprising the steps: providing a plurality of microcomponents suspended in a fluid medium, each microcomponent having a terminal; providing a template comprising a substrate having a plurality of binding sites, each binding site having a solder spot, and an interconnect network connecting the plurality of binding sites, wherein the template defines a plurality of ridges defining traps, each ridge disposed on a downstream side of one of the plurality of binding sites, wherein the ridge is sized to trap one of the plurality of microcomponents; providing a panel over the template and adjacent the ridges such that a channel is defined between the template and the panel wherein the plurality of ridges extend substantially across the channel; flowing the fluid medium with the plurality of microcomponents through the channel such that at least some of the plurality of microcomponents are trapped by the plurality of ridges, each trapped microcomponent being disposed at one of the plurality of binding sites with the terminal disposed adjacent the solder spot; and heating the solder spots such that the solder spots melt, and thereafter cooling the solder spots such that the solder spots solidify, thereby attaching the trapped microcomponents to the binding sites; wherein the template further comprises a first number of removable blocking members disposed on an upstream side of a first number of the plurality of binding sites, and further comprising the steps of: removing the removable blocking members; providing a second plurality of microcomponents suspended in a second fluid medium; flowing the second fluid medium with the second plurality of microcomponents through the channel such that at least some of the second plurality of microcomponents are trapped by the plurality of ridges.