Method of manufacturing a semiconductor device having leads stabilized during die mounting
View Patent ↗A semiconductor device comprises a plurality of inner leads extending around a semiconductor chip, a tape substrate supporting the semiconductor chip and joined to respective end portions of the inner leads, wires connecting the inner leads and pads formed on a main surface of the semiconductor chip, a seal portion formed by resin-sealing the semiconductor chip and the wires, and a plurality of outer leads linking in a line with the inner leads and protruded from the seal portion to the exterior of four directions. A relationship between a length (a) of a shorter side of the semiconductor chip and a clearance (b) from the semiconductor chip, to a tip of the inner leads arranged at the farthest location from the semiconductor chip is a≦2 b . It is possible to attain a narrow pad pitch, and mount the semiconductor chip formed in a small size, and standardize the lead frame.
1. A method of manufacturing a resin-sealing type semiconductor device, comprising the steps of:
preparing a multi-link lead frame formed by linking a plurality of package areas in a line, each of the package areas including a plurality of inner leads and a thin sheet-shaped insulating member joined to an end portion of each of said inner leads and capable of supporting a semiconductor chip;
thereafter mounting a semiconductor chip on said insulating member in each of said package areas on which said inner leads and said insulating member are joined;
connecting surface electrodes of said semiconductor chips and said inner leads corresponding thereto by respective wires;
forming a seal portion by resin-sealing said semiconductor chips, said wires, and said insulating members; and
separating a plurality of outer leads exposed from said seal portion, from a frame section of said lead frame;
wherein said mounting step is performed such that a length of a shorter side of a main surface of said semiconductor chip formed in a quadrilateral shape is twice or less than twice a distance from a tip of the inner leads arranged at the farthest location from a center line of the semiconductor chip in a plane direction, to said semiconductor chip.
2. The method of manufacturing a semiconductor device according to claim 1 , wherein said mounting is performed by step mounting said semiconductor chip on a surface of an inner lead arrangement side of said insulating member.
3. The method of manufacturing a semiconductor device according to claim 1 , wherein said preparing step includes a step of providing an adhesive layer disposed throughout the entirety of a surface of an inner lead arrangement side of said insulating member.
4. The method of manufacturing a semiconductor device according to claim 1 , wherein said preparing step includes a step of providing an adhesive layer disposed only on a lead joining portion of a surface of an inner lead arrangement side of said insulating member.
5. A method of manufacturing a resin-sealing type semiconductor device, comprising the steps of:
preparing a matrix frame by arranging a plurality of package areas in a matrix arrangement, each of the package areas including a plurality of inner leads and a thin sheet-shaped insulating member joined to an end portion of each of said inner leads and capable of supporting a semiconductor chip;
thereafter mounting a semiconductor chip on said insulating member in each of said package areas on which said inner leads and said insulating member are joined;
connecting surface electrodes of said semiconductor chips and said inner leads corresponding thereto by respective wires;
forming a seal portion by resin-sealing said semiconductor chips, said wires, and said insulating members; and
separating a plurality of outer leads exposed from said seal portion, from a frame section of said matrix frame;
wherein said mounting step is performed such that a length of a shorter side of a main surface of said semiconductor chip formed in a quadrilateral shape is twice or less than twice a distance from a tip of the inner leads arranged at the farthest location from a center line of the semiconductor chip in a plane direction, to said semiconductor chip.