SPI Supplies Brand Silicon Nitride Membrane Window Grids, 2µm Holes, Preforated, Pack of 10 Gr
Frame thickness: 200 µm
Membrane size: 0.5 x 0.5 mm (500x500 µm)
Membrane thickness: 50 nm
Holes: 2 µm holes on 4 µm centers
Pack of 10 grids
Using the very latest MEMs technology and processing techniques, we can now offer an array of holes, 2µm in diameter on 4 µm centers. The entire area of the membrane window is "holey" and the the array of holes covers the membrane area in its entirety. Quantitatively, there are 113x113 rows/columns for a total number of 12,545 holes per membrane. There is a staggering of the rows for increased mechanical strength. The outside frame will fit comfortably in any TEM grid holder designed for 3.05 mm diameter grids.
A Note of Caution Before Use:
The typical TEM grid has a thickness of 30-50 µm whereas these grids are 200 µm thick. For most TEM users this larger thickness presents no problems what so ever. However, for the first time user make sure you do not "force" the holder too tight. If you should be one with a holder that is just "too snug", we suggest contacting your TEM vendor supplier since they would have information about how the holder could be modified to more comfortably "take" this thicker grid. But as mentioned earlier, most users report no difficulties whatsoever in the use of these somewhat thicker grids.