Industrial applications of nanoimprint technologies usually require some form of sub masters. These are also called daughter stamps, daughter molds, soft molds or even just master replicas.
A sub master is a replica of a master stamp. It is used for replication onto the substrates. For example, you can make a sub master from a working stamp – this will be a third generation of a working stamp (the master is the first generation). We also see fourth or more generations of working stamps in the industry.
Generations of sub masters
The reason for making several generations of sub masters can be to invert the polarity of the pattern, or it can be a matter of master preservation. If you expect the lifetime of the master to be 100 replications, and each sub master is good for 10 replications, but you need to get 1 million replicas from your master, then you need to produce your devices with a fifth generation (or more) sub master. (numbers are completely made up to suit the example).
We have several sub master technologies. Some are strictly in-house, some are developed in collaboration with customers and project partners, and some are commercially available. We are happy to share our knowledge with our master customers, and we can also fabricate sub masters to order.
Please reach out to us if you would like to know more.