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February 13, 2006
Ponte Solutions - Design for Yield (DFY)
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Jack Horgan - Contributing Editor

by Jack Horgan - Contributing Editor
Posted anew every four weeks or so, the EDA WEEKLY delivers to its readers information concerning the latest happenings in the EDA industry, covering vendors, products, finances and new developments. Frequently, feature articles on selected public or private EDA companies are presented. Brought to you by EDACafe.com. If we miss a story or subject that you feel deserves to be included, or you just want to suggest a future topic, please contact us! Questions? Feedback? Click here. Thank you!


In order to establish differentiation or to tout a significant strength of a company or a product line marketeers create new terminology or acronym such as DFT for Design for Test (or Testability) or DFM for Design for Manufacture (or Manufacturability). There are so many terms that one can speak of Design for “ilities”. Of course every design team is concerned with these metrics but a given design tool might be especially well suited to improve a design in these areas. A relatively new term is DFY for Design for Yield. DFY might be considered a subset of DFM or a new generation of DFM. Ponte Solutions is a startup firm in this DFY space. I had an opportunity to interview
Jerry Rau who has recently joined Ponte as VP of Worldwide Sales.

Would you give us a bit on our background?

My background is a combination of semiconductor and EDA, a variety of different positions. My background is actually chemical engineering from MIT a long time ago. My first job was working in a fab which turns out to be relevant to my new position. When I was in the fab, I got interested in the business side and moved into marketing. From there I went to LSI Logic. While I was there I got a masters degree from Stanford in Material Science, semiconductor physics kind of stuff. I went to LSI Logic as a project manager. I was there a few years learning about the ASIC model. Then I went to Synopsys as product manager for version 1.2, so quite early there. I had a lot of different jobs
at Synopsys. Went into business development and ultimately into sales. I came back around to get back into a smaller company, Ponte Solutions, and sort of put it all together into a role in a software company where most of the people around me have a background in semiconductor as well. Our mission is to bridge the physical world of what's going on in the fab in terms of defects and yield loss into the design side.

On Ponte's website your biography states “As IP & Professional Services Sales Director at Synopsys, Rau's leadership addressed significant IP license issues faced in the emerging China market.” What were those issues and how did you address them?

As you know China has a less than robust IP protection environment. While I was at Synopsys, one of my jobs was managing a sales team selling IP and professional services for Synopsys' products in the Asian market, in particular China. We had sort of a conflict. We wanted our product to be sold in the fastest growing market in the world but at the same time you are sort of (I am not sure of the right phrase) feeding the tiger. You are selling IP, you sell it once. If it's misused, it could undermine all future sales efforts. We had a great hesitation about putting out our very valuable IP into the China market. We addressed it in two ways. First, we did security audits of global
thinking companies in China (I won't name them). The very biggest companies in China are trying very hard to overcome whatever bad image the China market has for IP protection. They are actually protecting IP probably better than anyone else in the world. We really dug into what they are doing to understand whether we could trust that environment or not. The second thing we did was the IP we were selling in most parts of the world was at the RTL level which is highly transportable. We looked at how we could harden the IP in a manner that when it was delivered into China, if it got out, it would do much less damage but it would be still useful to complete the design phase.

Again your biography says you managed third party sales channels. Mostly in Asia?

Yes, mostly in Asia. I took that job when Synopsys acquired Avanti. We suddenly acquired all the third party channels that Avanti had. They had many more than Synopsys at the time, mainly throughout Asia. As part of that acquisition and building out the sales channel, we decided to keep some of those on board although there were a few scattered throughout the other channels.

It is not unusual for a company to have overseas partners who understand the local culture, language and business processes. But these partners can be hard to control and may not have sufficient focused resources.

Coming from Synopsys you could make them focus, if you wanted to, because you have enough product line that they can dedicate resources or you can say this overlaps with our direct sales force and we would like to find a way to transition it in. Distribution from the perspective of a Synopsys is very different than that of small company.

What attracted you to move from Synopsys, an industry leader, to a small company like Ponte Solutions?

When I joined Synopsys, it was a small company. I was number 100 or so. It was a small company that had a great product that customers were clamoring for. I got to be part of some fantastic growth. Honestly throughout my career I was always saying to myself that I am a startup kind of guy, a guy who wants to create things. But the ride was too much fun at Synopsys, doing great things and growing to over a $1 billion. What really attracted me to Ponte is that when you talk to a customer about what Ponte does and the whole design for yield type of market, the return on investment and the need is just absolutely apparent. In so much of EDA you get into these conversations about saving
engineering man-days and time to market. Everyone puts up the same slides, waves the flag around that without a whole lot of differentiation. When I am visiting customers from the Ponte side absolutely everybody rallies to that and says “Wow, if you could save us 1% on yield or help us reduce the die size without killing the yield that goes directly to cost savings and to the bottom line.” Finally I saw a company that looks like it could really make a difference in the business model of our customers. It was too exciting to pass up.

Would you give me an overview of Ponte Solutions?

The company was started about 3 years ago. I wasn't here at the time so I don't have all the details about what the motivation was. What we are focused on is what I would call third generation DFM or DFY (design for yield). It is very customer driven. The first generation of DFM was companies like TDS that are really helping companies define the process control window. That's completely on the fab side that says that the window on this edge is from A to B and as long as you are in that window we expect the transistors to function and the metal won't evaporate and so on. The second generation of DFM is what I would call optical enhancement of the GDS. Make a mask so that when you
shine light through it, it won't degrade. This is commonly called RET for resolution enhancement techniques. You are probably familiar with a lot of companies doing that. That's a fairly big market and a valuable one. A lot of investment is going there. The third generation is what we are doing which is to take the failures that happen on the manufacturing side and capture them in a way that designers can do something about that, to anticipate that if I design this way my yield will suffer or if I design it this way, my yield may be better and drive my yield numbers up from the design side not just from the standpoint of can I get the process operating within this window.

The company began life as E-Z-CAD. Why did the company change its name to Ponte Solutions?

I think E-Z-CAD doesn't really describe what the company does. It doesn't help build a brand. It doesn't help people understand what it does. Ponte on the other hand is nice, it's easy to remember. It actually means bridge in Italian. That's what we are doing - building a bridge from manufacturing to design. So it sort of makes sense. It's a very nice name, short, and memorable. When it is dissected it has some relevance to this market.

Looking at the logo I can see something that looks like a bridge.

I think Alex and others that started the company and were in stealth mode, wanted to come up with something quickly that did not give anything away; a moment of engineering mischievousness. Let's just call it EZ Cad and see where it goes form here.

How many employees does Ponte have?

About 70 now! Probably 10 to 15 are in the US. The bulk of them are in engineering in Armenia. It turns out to be a fantastic place to have a R&D team because first of all it has a cost structure that is less expensive than the US and second of all it is a very talented team. There are a whole lot of mathematician and software developers that have come out of Armenia and the former Soviet Union. I would characterize the people that I have met from Armenia who work for Ponte as extremely hard working, dedicated, motivated every bit as much as anyone I have met form India or China. It is a pretty good situation there.

Would you comment on the number of customers and revenue that Ponte has?

I don't think I can announce what those numbers are. We do have revenue. We are shipping product that customers pay for. We are in a production mode. We have a set of customers using the product, the first versions of releases. We haven't officially announced the product, we have announced the company but the product announcement will come up in the next couple of months. At that time we will give some details about how people are using it and what impact it has had.

Your web site does not have a description of the product.

I will tell you in essence where we're headed which is developing a yield model. Usually the way yield has been handled on the design side is through design rules. The issue there is that the fab has simply said that if you follow these rules, the design will yield. We all know that this is breaking down. Yields are not high at 90 nm and below. The solution to that is to provide a model instead of rules that provides the tradeoffs. If you can afford to do this, maybe spreading things out a little bit more, you should be able to get more yield, maybe doubling up on vias. There is a whole set of techniques there. We are trying to capture that in a model that will cover a wide variety
of different kinds of defects. That way with our first tools and analysis design teams can look at the design and make some quantitative judgments the yieldability of their design work.

The rule based approach to DFM is dependent upon process node, the fab and so forth. Are you models also dependent on these factors or are their generic?

The models are generic because it is physics. But to make them really work, you need foundry data. One of the things we haven't announced the particulars about is that we have cracked the foundry model. There will be foundry data available for use with our tools. Our customers have told us that this is a requirement. They have helped us working with the foundries to make that data available. That's actually one of the big barriers that you hear when you talk to small companies that are in this space. You are going to find that having the foundry data is a critical element to the believability of the analysis. In general the foundries don't want to give out their defect data because
they will essentially admit that they have failures. Everyone knows that they have failures but they don't want to publish that data. We have come at them from the standpoint that the customers want it because they need to be able to predict what their costs are going to be and we've also built a model around it where there is encryption. So the actual data is protected.

Are there any competitors coming at the problem in a similar way?

Not that we are aware of. There are a lot of companies that are focused on what I would characterize as second generation. I am not aware of any companies focusing where we are on being the design side, building this statistical yield model.

What is your sales model, direct or indirect?

A combination! We have already signed up two distributors. We will probably make some public announcements about that but it is not a secret. A group in Taiwan called Markettech (MIS) and a group in Korea called Win Technology. We use a combination of direct and distributors.

What is the packing of the product (development license, royalty, …)?

At this point we are not going to reinvent the wheel. We are going to go with a straightforward EDA software license, primarily subscription. A small portion of customers have asked us for perpetual license which we will have as well. As a small company we are not going to attempt to change the market to some different formulation.

What is the price range for the product?

It will be in the $100K range to get started. The product announcement will have more specifics in a couple of months.

Would every design engineer have a seat or only certain experts?

The way I characterize it, it is really at the physical design level not at the RTL level, not at the ESL level. It could be used as early as someone is doing floorplanning. It can be used in library development and used at the system design level to make tradeoffs. These are the three areas that are most likely to use it.

How does DFY relate to DFM? Subset? Complement?

We touched on that earlier in terms of the three generation and how the third generation is actually DFY. My belief is that DFM is one of those terms that has become somewhat meaningless because what does it mean to design in order to be able to manufacture. If you are not designing it to be manufactured, what is the point of designing it. The issue is more one of cost and bridging from the manufacturing data into the design side. The first two generations are purely on the manufacturing side. A designer doesn't need to know what the mask actually looks like that is going to print his circuit. A designer doesn't really need to know where the process windows are on exposure, aperture
and so forth. They just assume that if I follow a set of rules, I should get yield out the back end. DFY is that third generation where a designer can get data in a model in a manner that is meaningful to make tradeoffs that impact yield. Manufacturability is not a binary where it works or it doesn't. It is a statistical event that happens.

Armed with this data what steps can a designer take to increase the yield of his design?

It's a little beyond our tools. Out tools are analysis tools. For instance, we can look at different floorplans of a chip that are all possible at trial layout and then run an analysis to see which one more likely to have less yield loss, i.e. will yield better. You can also look at library elements, different figures of merit on different ways of laying out a cell and which one would be yielding well. One of our early customers looked at the library elements of a very large chip. They determined that something like a dozen library elements were each used 50,000 times. There were some yield issues within those elements. By going back and resigning those elements without a penalty in
area they were able to increaser the yieldability of that overall chip. The analysis is to find the issue, figure out something to do with it and give yourself a benchmark of whether you can improve or not. It could be at the floorplanning level, the aspect ratio of the chip, or it could be down to a cell level. It could be a library element.

Does Ponte have any patents on their technology?

We are working on patents. We have submitted some.

Is this product for general usage or are there some applications that would benefit most?

We haven't found that yet. At this point we are being approached by companies in different industries with different applications. It doesn't appear that there is any particular niche. There is certainly no limit to applying this product to different kinds of applications. The question I think you are asking is “Are there certain applications crying out more than others?” I haven't seen a pattern yet.

Does the need for and the value of your product increase as one goes from 130 nm to 90 nm to 65 nm?

Absolutely! I've heard that going to 90 nm yields are really going down. I've heard estimates at 65 nm getting single digit yields. There's a lot of room to improve there. The design rules really exploded The foundries don't really have a great grip on following those rules because it has been hard and fast rules like keeping your metal this far apart that have become traditional rules. If there's a second structure that is in the vicinity of the metal, use a different rule. It's becoming too much to manage for the people who have to actually implement those rules.

Prospects recognize the problem and see the value in what you offer. How do you convince them that you can deliver?

The first thing you need is vision match. The operative question is “If you yield could improve by a small amount, would that be a good thing?” The calculation goes” How big is my wafer? How many dies? What's my current yield? What does that translate into in terms of cost savings by running less wafers or perhaps it is from the standpoint of now I get more good dies through the fab early on, actual have product on the shelf. Right now as an example I think Microsoft wishes that they could have made more Xbox but the yields have been pretty dismal is my understanding. The benefits could be spoken of in a number of different ways. I mentioned before if you have
this conversation everybody is in favor of having a higher yield or lower cost die. When you talk to people about ESL I think the reaction is some people say “That's exactly where we want to be.” Other people say “That's kind of interesting but why would I use that or that's a little too domain specific. We are a little different. It doesn't apply.”

In reality anybody who is making a chip whether they are a chip company, a foundry, an IP company have an interest in making the yields as bets as they can be.

How do you convince prospect (reference, benchmarks, ..)?

All of our customers are running benchmarks, seeing what the differences are in comparison. In test cases it's apparent to them. I will give you an example. Improving yield is not a new thing. There has always been a first spin of silicon. Now let's do a second spin maybe change this functionality and by the way clean up a few things to make the yield higher. One company we are engaged with had spent six months doing a diagnosis on why a chip was yielding so poorly. We engaged them and ran their design through our system. We presented back to them out observations and recommendations that we came with by running our tool. They looked at what we had done and said “You did
that in six weeks! We took six months to come up with the same set of things.” They were quote unquote sold at that instant that this was a tool that could provide real value in their process.

At the beginning we are going to be proving to people on a benchmark level. They are going to have to see it to believe it. It's the traditional software process. As you announce success stories and reference accounts other companies will say “If they are doing it, we want to do it also.”

It can be difficult to get reference accounts.

You are absolutely right. Some people don't want to and some people do. Fortunately there are enough who do. I don't see it as an issue. If you visit enough websites in particular EDA companies you will see that there are lots of people willing to be references.

What is your biggest challenge over the next 12 months?

For a small company to is usually bandwidth; getting the bandwidth so that you can engage with people efficiently. That's probably the biggest challenge.

Do you have enough sales people on board to meet that challenge?

I think we are where we need to be right now. We see some growth coming our way as products and references are announced. We've got plans to staff up. As a venture backed software company, it is always a difficult to ensure that you are using the cash in the most effective manner. You use that to bring in more revenue and help provide more investment in the product and in the sales channel. I think we are now exactly where we want to be. As the product gets announced and gets deployed we should be able to staff up. I don't see that as any kind of a barrier but rather a natural progression.

Alex Alexanian who founded Mosaic Systems, is the President and CEO of Ponte Solutions. How is he to work for?

We are all engineers by background. We communicate very well, high bandwidth which is great. He is a great guy, very knowledgeable about the engineering side. On a personal level he is open to learning about building a business rapidly. He is a decisive kind of guy, so a good leader. The whole Armenian connection is unique with us. There is a lot of talent in Armenia. There are probably only a handful of people here in Silicon Valley who could have taped that. It's fortunate that he had that ability to go do that.

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-- Jack Horgan, EDACafe.com Contributing Editor.