Microfluidic Cartridge Void Space Prevents Channel Deformation

The device is divided into multiple parallel channels, each with its own obstacle array. This segmentation allows continuous processing of large volumes while preventing debris accumulation from blocking the entire system, as each channel operates independently. The segmentation maintains high productivity while ensuring reliable purification by distributing flow across multiple paths.

The obstacle arrays are pre-configured with specific geometries and spacing to create size-based separation zones before the actual purification process begins. The channels are designed with predetermined flow characteristics that guide cells and debris into appropriate separation zones, ensuring efficient purification from the start of processing without requiring intermediate adjustments.

The obstacle arrays are fabricated as thin planar structures with uniform thickness, allowing them to be manufactured using standard photolithography and etching techniques. This approach creates delicate posts and obstacles with precise dimensions while avoiding the need for complex three-dimensional manufacturing processes. The thin-film nature of the obstacles reduces manufacturing complexity while maintaining size-based separation capability.

The obstacle geometry parameters (height, width, spacing, arrangement patterns) are systematically varied to achieve different separation characteristics for various cell types. By changing these parameters rather than redesigning the entire structure, the device can be manufactured with standard processes while achieving precise size-based separation for different applications.

Physical barriers and channel walls act as intermediaries between adjacent lanes, preventing direct mixing of samples while allowing parallel processing. The channel design includes defined boundaries and separation structures that maintain laminar flow in each lane independently, enabling high throughput without compromising flow stability or causing turbulent mixing between channels.

The flow path is segmented into multiple independent parallel channels with distinct boundaries. Each channel processes sample independently with controlled flow characteristics, allowing the system to achieve high throughput through parallelization while maintaining stable laminar flow conditions in each segment without interference from adjacent channels.