Quoted from Homepin:Like all things legal - it isn't as simple or clean cut as you make it. Yes, the layout is certainly copyrighted IF and ONLY if it is copied EXACTLY. The schematic diagram DRAWING would also be copyright if copied exactly BUT NOT the actual electronic circuit - IE the collection of electronic components that make up a particular circuit.
The circuit is an entirely different matter. There is no, and has never been, any claim on copyright of an electronic circuit. This has been tested many times in court.
Actually the High Court of Australia have affirmed in relevant copyright cases (Nintendo v Centronics for one) it does not need to be an exact copy to give rise to infringement.
In the Centronics case, the company manufactured a chip which contained an IC that was found to be substantially similar to the Nintendo IC. This substantial similarity test against the Nintendo IC was sufficient to constitute a breach of the Circuit Layouts Act and Nintendo's IP rights.
Accordingly injunctive relief and damages including an account of profits plus costs were awarded to Nintendo. Centronics and its owner directors subsequently declared bankruptcy after being unable to service the judgement.