BCD: The Poet TDK was announced as complete on April 7th.

WARNING, nit picking ahead! (If you enjoy such things, read on! Else just recommend this post and click on "Next Message"! :-))

Hm, since you mentioned the TDK: The company sometimes is lousy, imprecise and inconsistent on wordings. This can be seen easily at the news release BCD is referring to. It announced … – oh, what was it that was actually announced on April 7th? The headline of that NR reads as follows:

"POET Technologies Announces Completion and Availability of POET Technology Design Kit Documentation (POET/TDK)"

Ah, okay. So they announced the POET Technology Design Kit Documentation (repeat: Documentation) and they abbreviated it as POET/TDK or simply TDK, as can be seen in the NR's text. Well, that's confusing, because:

• It's not the POET Technology Design Kit that is abbreviated as POET/TDK.
• It's not the POET Technology Design Kit Documentation that is abbreviated as POET/TDKD.
• No, it's the POET Technology Design Kit Documentation
  that is abbreviated as POET/TDK (without a D).

In the same NR they introduced some more terms:

• PET (Planar Electronic Technology)
• PET/TDK, obviously meaning, but not explicitly being defined as the PET Technology Design Kit Documentation
• PET/TDK models, meaning the PET devices modelled in software with a TCAD tool

Perhaps they were (understandably) not quity happy with these definitions themselves. Anyhow, in the news release of 2014-05-27 the term PET/TDK no longer means "PET Technology Design Kit Documentation", but simply "PET Technology Design Kit" (without the word "Documentation"). This term seems to mean the PET devices modeled in TCAD software. In other words: The PET/TDK is a library of all PET device models and their corresponding process models. Okay, that makes sense, except that the wording is inconsistent again when the NR speaks of "PET/TDK models" when "PET/TDK" should be sufficient.

After we have had a few months' time to get accustomed to the term TDK, the first news release of 2014-09-02 changed that to without any explanation to PDK (Process Design Kit). Regarding the PDK for PET, they omitted the slash and are now writing "PET PDK" instead of "PET/PDK". However, at one place they didn't pay attention and still wrote "PET/PDK". Oh, they even had it "PET/TDK" in the forward-looking information disclaimer.

The second news release of the same day is consistent with that. Even the disclaimer is correct.

Okay, enough nit picking for tonight!To sum up, my understanding is as follows:

• The full POET technology design documentation has been completed (announced on 2014-04-07).
• The PET PDK is a TCAD software library containing all the PET (electrical only) devices and processes as software models. It will be available at the end of this year and will enable chip designers and foundries to design and fabricate 40 nm PET chips.
• The POET PDK is a TCAD software library containing all the POET (optical and electrical) devices and processes as software models. It will be available at some yet unknown point in time and will enable chip designers and foundries to design and fabricate POET chips at a yet unknown node size.