US 12,255,117 B2
Heat sink with turbulent structures
Xu Zuo, Saratoga, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Filed by Google LLC, Mountain View, CA (US)
Filed on Jan. 4, 2023, as Appl. No. 18/149,990.
Application 18/149,990 is a continuation of application No. 17/318,900, filed on May 12, 2021, granted, now 11,574,850.
Application 17/318,900 is a continuation of application No. 16/843,536, filed on Apr. 8, 2020, granted, now 11,039,550, issued on Jun. 15, 2021.
Prior Publication US 2023/0154821 A1, May 18, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01L 23/367 (2006.01); F28F 13/12 (2006.01); H01L 23/467 (2006.01); H05K 7/20 (2006.01)
CPC H01L 23/3672 (2013.01) [F28F 13/12 (2013.01); H01L 23/467 (2013.01); H05K 7/20154 (2013.01); F28F 2215/10 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a fin having a fin planar surface, a periphery of the fin defined in part by a fin edge;
a set of turbulent structures extending from the fin planar surface, each turbulent structure of the set of turbulent structures defining a longitudinal axis and having a structure body, a periphery of the structure body defined by:
a first edge that is parallel to the longitudinal axis and attached to the fin planar surface; and
a second edge in a space adjacent to the fin planar surface, the second edge opposite and spaced apart from the first edge, and the second edge having a repeating pattern that varies in distance from the first edge along a length of the longitudinal axis;
a third edge between one end of the first edge and one end of the second edge; and
a fourth edge opposite the third edge, the fourth edge between another end of the first edge and another end of the second edge;
the first edge, the third edge, the second edge and the fourth edge defining a turbulent structure planar surface and the periphery of the structure body; and
each structure body in the set of turbulent structures is attached to the fin planar surface at an acute angle relative to the planar surface;
a plurality of terminal nubs, each of the terminal nubs is separate from each other of the terminal nubs and extends substantially perpendicularly from the turbulent structure planar surface at a position on the second edge that is at a distance farthest from the first edge relative to other positions on the second edge; and
the second edge and the terminal nubs are further shaped such that a first turbulent flow of a fluid is induced in the fluid flowing over the second edge at at least a predefined flow rate in a direction perpendicular to the longitudinal axis.