The Problem with Legacy CVD
Traditional Chemical Vapor Deposition (CVD) grows graphene on copper foil. To use it, the graphene must first be coated in a polymer support layer, typically PMMA. The copper substrate is then removed using acid etching before the graphene is physically transferred onto a semiconductor wafer.
Residual copper atoms, trapped polymer contamination, wrinkles and micro-fractures can remain within the material. The result is a graphene layer that varies from device to device, creating challenges for repeatability, yield and industrial scalability.
The Paragraf Breakthrough: Direct-Growth MOCVD
Paragraf's proprietary Metal-Organic Chemical Vapor Deposition (MOCVD) process grows graphene directly onto the final semiconductor substrate, typically 6-inch silicon or sapphire wafers. No copper or other metals.
Absence of a D-Peak
Raman spectroscopy demonstrates a high-quality graphene lattice, helping to preserve the intrinsic electrical and mechanical properties of the material.
Wafer-Scale Uniformity
Lot-to-lot baseline uniformity enables consistent production across millions of devices, enabling true CMOS foundry compatibility.
The Ultimate Blank Canvas
For molecular detection applications, MOCVD graphene provides a pristine surface for precise and repeatable functionalisation.
