Patent ID: 8436391

Claim:
A pre-molded leadframe house for light emitting device comprising: a heat dissipation base including a concave house; a plurality of electrodes disposed around the heat dissipation base; an insulation binder that supports said heat dissipation base and said plurality of electrodes, wherein said insulation binder has a plurality of concentric closed dams circumferentially distributed around the top of said concave house and a plurality of concentric closed grooves between the dams, wherein said plurality of concentric closed dams function as multiple barriers to prevent an encapsulating liquid resin if it is dispensed in said concave house from flowing centrifugally outward from said concave house during the dispensing and solidifying stages of said dispensed resin, wherein a bottom of an outermost groove of the plurality of grooves is disposed higher than a bottom of an innermost groove of the plurality of grooves, and a bottom of an intermediate groove between the outermost groove and the innermost groove has the same level as the bottom of the innermost groove.