The consent order rubber stamped the new US ownership, but it came with some conditions.
The UK government must be informed if Vishay plans to enter into any future agreement to sell, transfer or lease to any third party that would give them access to the factory.
The £51m investment includes £5m from the Welsh government and will bring new products and jobs to the Newport company.
Evans said: “Compound semiconductors are all around us – in our homes and in our phones, our trains and our turbines.
“They are a vital, if miniature, piece of what makes the modern world tick, with extremely strong global growth projections.
“And we in Wales are increasingly a world-leading nation in their production and manufacture.
“Today that is more evident than ever, with our international reputation attracting significant inward investment, the provision and occupation of state-of-the-art facilities, clear links with R&D and well-paid opportunities for employment and apprenticeships.
“We are now, after a decade of seeding the cluster, reaping the rewards of our commitment which we will continue to drive forward.”
The chip factory on Cardiff Road began as Inmos in 1980 but has changed hands numerous times in the decades since.
It is the UK’s largest manufacturer of semiconductors.
Welsh Conservative shadow economy minister Samuel Kurtz said the investment in the plant was “welcome news that will burnish Wales’ proud manufacturing credentials”.
“The vital and secure investment from our allies in the US would not have been possible without the [previous] UK Conservative government’s strategic decision-making.”
