SEMICONDUCTOR DEVICE WITH TALL AND SLENDER INTERCONNECTING BUMPS AND CORRESPONDING MANUFACTURING METHOD

A semiconductor device (100) includes a first plate-like element (104) having a first substantially planar connection surface (112) with a first connection pad (114) and a second plate-like element (102) having a second substantially planar connection surface (110) with a second connection pad (114) corresponding to the first connection pad (114); and a connection (106+108) electrically and physically coupling the first and second plate-like elements (104, 102) and arranged between the first and second connection pads (114). The connection (106+108) includes an elongate element (108) arranged on the first connection pad (114) and extending toward the second connection pad (114) and solder (106) in contact with the second connection pad (114) and the elongate element (108). The first or second plate-like element (104, 102) may comprise a die, in particular, a bridge die. An electronic system (800) may comprise the semiconductor device (100) and an electrical component electrically coupled to the first plate-like element, wherein the electrical component may comprise an antenna (878), a touch screen and/or a personal computer. A method of assembling a semiconductor device (100) comprises: heating first and second plate-like elements (104, 102) to a solder reflow temperature; and pressing the first plate-like element (104) against the second plate-like element (102) with pressing an elongate element (109) extending from a first connection pad (114) on the first plate-like element (104) toward a second connection pad (114) on the second plate-like element (102). The resulting connection formation (e.g., between a solder bump (107) on the second connection pad (114) and a corresponding elongate element (109)) may depend on the location of the connection and the deformations, warping, or other factors that affect the space between the first and second plate-like elements (104, 102) at various locations. A preassembled height (122) of the elongate element (109) may comprise a pillar (128) and the pressing may comprise pressing the first plate-like element (104) until the elongate element (109) contacts the second connection pad (114) and continuing to press until a selected compression limit is reached. A preassembled height (122) of the elongate element (109) may comprise a pillar (128) (e.g., a hard pillar or a malleable pillar) and a solder cap (126), the pressing step forcing the solder cap (126) to reflow, in particular, to reflow with a solder bump (107) on