Vapor cooling device for semiconductor device

Claim 1

A vapor cooling device for a semiconductor device comprising, in combination, coolant reservoir means having an amount of a condensible coolant in the form of a liquid phase charged therein including a liquid surface within said reservoir, a plurality of heat dissipation blocks disposed below said coolant reservoir means including respective hollow spaces therein, one connection tube member for connecting said coolant reservoir means to each of said heat dissipation blocks thereby to fill said hollow space in the associated heat dissipation block with said coolant in its liquid phase, a plurality of semiconductor elements in compressive contact relationship between adjacent heat dissipation blocks for being cooled through boiling of those portions of said liquid coolant disposed in said hollow spaces, condenser means disposed above said coolant reservoir means and in fluid communication with the latter, said condenser means cooling the coolant in its vapor phase from said hollow spaces in said heat dissipation blocks entering thereinto to condense said coolant into its liquid phase, liquid return means connected between said condenser means and said coolant reservoir and having a coolant inflow port in said coolant reservoir below the liquid surface of the coolant for returning said coolant condensed into its liquid phase back to said coolant reservoir below said liquid surface of the coolant, one auxiliary tube member disposed within each of said connection tube members including an upper end opening into said coolant reservoir means below said liquid surface of the coolant and a lower end opening in said hollow space in the associated heat dissipation block, and return conduit means in said coolant reservoir extending from adjacent said coolant inflow port to each of said auxiliary tube members for supplying to said auxiliary tube members that portion of said liquid coolant adjacent said inflow port through which said condensed coolant from said condenser means is returned to said coolant reservoir means.