Mold assembly for resin-sealing
AssigneeHitachi, Ltd.
InventorsTsuyoshi Shimizu, Katsuhiro Tabata
Life of this patent
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Abstract
A mold assembly for resin sealing for use in the manufacture of a semiconductor device etc., includes a pair of upper and lower molds. Elastic deformation parts adapted to be deformed in the direction of compression of the upper and lower molds with an object to-be-sealed, held therebetween, are provided on at least one of a cavity block of the upper mold and a cavity block of the lower mold. Grooves are provided in the surface of the cavity block formed with the elastic deformation parts.
Claims10
In a mold assembly including a pair of upper and lower molds, said upper and lower molds having parting surfaces and clamping an object to-be-sealed between said parting surfaces so as to effect resin sealing of said object,
- the improvement wherein each of said upper and lower molds comprises a cavity block and a holder formed with a concave portion for receiving said cavity block therein, said cavity block of at least one of said upper and lower molds being formed with
- a concave portion so as to define a mold space on the side on which it comes into contact with said object to-be-sealed,
- protrusions for deformation projecting beyond a surface of said cavity block on a side on which it comes into contact with a bottom surface of said concave portion of said holders, and
- grooves of a desired depth in said surface of said cavity block among said protrusions for deformation.
In a mold assembly for resin-sealing an object to be sealed and having a pair of molds having parting surfaces between which an object to be resin-sealed is clamped,
- the improvement wherein each of said molds comprises a cavity block and a cavity block holder formed with a concave portion for receiving said cavity block therein, the cavity block of one of said molds including
- a first surface facing the cavity block of the other mold of said pair,
- a second surface facing the cavity block holder of said mold,
- a cavity extending from said first surface to a prescribed depth into the cavity block,
- at least one protrusion extending from the cavity block to a distance beyond said second surface and in contact with the cavity block holder of said one mold, and
- a plurality of grooves extending from said second surface to a predetermined depth into the cavity block so as to segment the second surface of the cavity block.
Dependencies are inferred from the claim text.