US 12,403,471 B2
Microfluidic structures with angled exterior wall segments
Oumnia El Fajri, Corvallis, OR (US); Richard W. Seaver, Corvallis, OR (US); Erik D. Torniainen, Corvallis, OR (US); Anand Samuel Jebakumar, Corvallis, OR (US); Pavel Kornilovich, Corvallis, OR (US); Alexander Govyadinov, Corvallis, OR (US); and Carson Denison, Corvallis, OR (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
Filed on Apr. 15, 2022, as Appl. No. 17/721,650.
Prior Publication US 2023/0330673 A1, Oct. 19, 2023
Int. Cl. B01L 3/00 (2006.01)
CPC B01L 3/502753 (2013.01) [B01L 3/50273 (2013.01); B01L 2200/12 (2013.01); B01L 2200/16 (2013.01); B01L 2300/12 (2013.01); B01L 2400/0406 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A microfluidic structure, comprising:
a first microfluidic channel segment in a first elevation plane;
a second microfluidic channel segment in a second elevation plane;
a transverse microfluidic channel segment connecting and extending between the first microfluidic channel segment and the second microfluidic channel segment, the transverse microfluidic channel comprising a middle portion between the first elevation plane and the second elevation plane; and
an angled exterior wall segment at the transverse microfluidic channel segment,
wherein the angled exterior wall segment is angled in the first or second elevation plane at an acute angle with respect to a direction of fluid flow through the first or second microfluidic channel segment,
wherein a fluid cross-sectional area increases in the fluid flow direction along the angled exterior wall segment, and
wherein the angled exterior wall segment comprises a plurality of triangular wall segments extending from an upstream end wall of the transverse microfluidic channel segment into the middle portion of the transverse microfluidic channel and into the second elevation plane.