C-flat™ Family of Holey Carbon, Gold Grids for S/TEM and Cryo-TEM

CD-flat™ for Automated S/TEM Imaging and Metrology

CD-flat Grids

Now Available

CD-flat is designed for CD-TEM metrology of large specimens, like 3D NAND FIB lamella.


Grid MaterialCopper Grid
Mesh Size300 Mesh
OD3.05 mm
Film MaterialHoley Carbon
Film Thickness40 nm thick
Hole Pattern8/2 hole pattern (8 um diameter, 2 µ spacing between holes)

arrow11Au-Flat™ for High Resolution Imaging

Au-flat Grids
Au-flat Grids
Au-flat Grids


Au-Flat is an ultrastable Cryo-EM sample support with a 45nm holey Gold alloy film on 3 mm gold mesh grids. Au-Flat is a derivative of the patented C-Flat product.

Au-Flat improves your image quality and resolution with the gold alloy film, which reduces particle movement during imaging.

Au-Flat is offered in two configurations:

  • 1.2 µm/1.3 µm hole pattern on 300 mesh Gold grids
  • 2 µm/2 µm Hole Pattern on 200 mesh Gold grids

Better reconstructions with less data

Au-Flat significantly reduces beam-induced motion during imaging compared to carbon films, improving image quality and resolution.


Au-Flat features a holey Au/Pd film on a gold mesh grid, so it’s chemically inert and biologically compatible.


Au-Flat’s film is significantly stronger than carbon films and is more capable of surviving the Cryo-EM workflow including tweezer handling, glow discharge, blotting, auto-grid loading and plunge freezing.

Benefits over other Gold Foil TEM Grids

Fewer Mistakes The lighter color of the Au/Pd alloy film compared to the underlying gold mesh grid makes it easy to identify the “holey” side of the grid during sample prep. This ensures the sample is deposited on the correct side and that the grid is loaded and imaged in the correct orientation.

Stronger Au-Flat is produced with gold mesh grids that are about 6 microns thicker than typical Cryo-EM grids. This makes the grids stiffer and less likely to bend or deform. The increased thickness is fully compatible with side-entry holders as well as auto-loaders.


Grid MaterialGold Grid
Mesh Size200, 300 Mesh
OD3.05 mm
Film MaterialGold Alloy
Film Thickness45 nm thick
Hole Pattern1.2/1.3 hole pattern (1.2 um diameter, 1.3 µ spacing between holes)
2/2 hole pattern (2 um diameter, 2 µ spacing between holes)