Lightwave Logic Inc (LWLG)

[Lightning_Rod]

Where to find the standard >1000K devices:

Try as you may the only place one can find a standard of “> 1000” fabricated devices is at foundries and specifically in the PVT stage of production trials. Here are 4 links where it is clear that” > 1000 units” is an expectation of trial runs in the PVT stage.

PVT (PRODUCTION VALIDATION TEST) PVT is the last build the units you are building are supposedly intended to be sold to customers, if they pass all of your test stations. PVT typically transitions directly into Ramp and Mass Production, or a Pilot build with no time gap. PURPOSE: to verify mass production yields at mass production speeds Validate and qualify additional tools needed to support quantities for early ramp No parallel experimental units allowed (I have never seen this actually happen, but it is a goal that should be driven to for as long as possible) TYPICAL QUANTITIES: 1K to 20K
185600010.jpg

https://docplayer.net/185600010-A-guide-to-engineering-builds-evt-dvt-pvt.html


PVT (Production Validation Test)

PVT is the “last build” -- the units you are building are supposedly intended to be sold to customers, if they pass all of your test stations. PVT typically transitions directly into Ramp and Mass Production, or a Pilot build with no time gap.

Purpose:

To verify mass production yields at mass production speeds
Validate and qualify additional tools needed to support quantities for early ramp
No parallel experimental units allowed (I have never seen this actually happen, but it is a goal that should be driven to for as long as possible)

Typical Quantities: 1K to 20K

(This may be identical to the previous article but a different link)
https://www.linkedin.com/pulse/what-difference-between-evt-dvt-pvt-engineering-validation-jenny-he/


PVT (Production Validation Test)
PVT is the “last build” — the units you are building are supposedly intended to be sold to customers, if they pass all of your test stations. PVT typically transitions directly into Ramp and Mass Production, or a Pilot build with no time gap.

Purpose: to verify mass production yields at mass production speeds

Validate and qualify additional tools needed to support quantities for early ramp
No parallel experimental units allowed (I have never seen this happen, but it is a goal that should be driven to for as long as possible)
Typical Quantities: 1K to 20K



https://instrumental.com/build-better-handbook/evt-dvt-pvt#:~:text=PVT%20(Production%20Validation%20Test),all%20of%20your%20test%20stations.



WHAT IS A PVT?

Also called an MVT (Manufacturing Validation Testing), PVT (Product Validation Testing) centers around testing manufacturing capabilities at full speed and assuring quality at higher and higher volumes. In the product validation testing stage, engineers design and build quality control systems designed based on common manufacturing errors spotted in these early runs.

A product validation test often measures the quality of finished products made at full production speed. Normally this means making 1,000 or more units of a product and measuring for functional and cosmetic imperfections, as well as irregularities within the manufacturing process, like operator training level, line speed

improving-production-yield-thumb.jpg

https://www.infosys.com/iki/perspectives/improving-production-yield.html


There has been an attempt to place this standard of “extremely high yields in > 1000 poles units” in the lab in Denver. There are a number of things wrong with this vain attempt. Here they are:

1) in the context of the slide presentations a year ago the titles of the slides in order were:
A) P 22 Foundry Fabrication with PDK
B) P 23 Foundry Fabrication (vertical grating coupler)
C) P 24 Polymer Slot -Foundry Processing
D). P 25 Poling for Foundries

Clearly each slide is showing what is happening at the foundries.
To wrestle the phrase “extremely high yields > 1000 poles devices” and place it in another context such as the lab in Denver does injustice to all we know to be true about interpreting in context.

2) yields of 1000 or more are well known in the context of a foundry. Yields are well defined as the number of operational die on a wafer to the total number of die on the wafer and slide 24 mentions

PILOT wafers (SEM images)

. Clearly wafers were made at the Foundry so their yields can be determined accurately.

Inference to the best conclusion is to accept the phrase “extremely high yields in > 1000 poles devices” is a standard reached only in a foundry.

Bottom line…… the extremely high yields tell us that profitability has been reached at least in 2 foundries (A and D) as mentioned in the slides in the presentations.

L_R