Virtual Packages Improve Signal Integrity


The 112 Gb/s generation of SerDes has brought along excessive loss within the package, around 5 dBs of loss within each monolithic package. This loss markedly reduces the usefulness of these SerDes. MCM technology has progressed to where the use of 70mm packages is routine. Non-interposer MCMs easily can use 20 or more chiplets, plus large dies and passives can be used. These MCMs have low ... » read more

Defect Challenges Growing In Advanced Packaging


The current defect inspection systems for packaging are running out of steam for the latest advanced packages, prompting the need for new tools in the market. In response, several vendors are rolling out new defect inspection systems for use in various advanced packages, such as 2.5D/3D technologies and fan-out. The new defect inspection systems are more capable than the previous tools, but ... » read more

Kandou’s Glasswing IP


Introduction The growing digitalization of our society has made our lives connected and, in many aspects, easier. But the digital revolution also implies that the total amount of data processed in the world is doubling every two years or so. Electronic devices such as mobile phones, laptops, satellites, servers or self-driving vehicles must cope with twice as much data, at higher speeds. Tradi... » read more

How Much Data Can Be Pushed Through Copper Wires?


As the amount of digital data grows, so do requirements on the speed of the transmission at all levels of the transmission chain—between dies in a shared package, between packaged chips inside a device, and between devices. The communication channels encountered at every stage of this communication are different in nature. Those between dies in a shared package, or between packaged chips in a... » read more

Processing In Memory


Adding processing directly into memory is getting a serious look, particularly for applications where the volume of data is so large that moving it back and forth between various memories and processors requires too much energy and time. The idea of inserting processors into memory has cropped up intermittently over the past decade as a possible future direction, but it was dismissed as an e... » read more

The Chiplet Race Begins


Momentum is building for the development of advanced packages and systems using so-called chiplets, but the technology faces some challenges in the market. A group led by DARPA, as well as Marvell, zGlue and others are pursuing chiplet technology, which is a different way of integrating multiple dies in a package or system. In fact, the Defense Advanced Research Projects Agency (DARPA), part... » read more

Chord Signaling by Generalizing Differential Signals


Chord signaling is a multi-wire signaling approach that is a generalization of differential signaling. With differential signaling, a single bit is transmitted on two correlated wires. In Chord signaling, n bits are transmitted on n+1 correlated wires. The number of wires, the Chordal code and the design of the multi-input comparators together. Background Companies connect chips in elect... » read more

Return Of The Organic Interposer


Organic interposers are resurfacing as an option in advanced packaging, several years after they were first proposed as a means of reducing costs in 2.5D multi-die configurations. There are several reasons why there is a renewed interest in this technology: More companies are pushing up against the limits of Moore's Law, where the cost of continuing to shrinking features is exorbitant. ... » read more

Week In Review: Manufacturing, Test


Trade issues China and the United States are embroiled in a trade war. What is the impact? In testimony submitted to the Office of the United States Trade Representative (USTR) on the proposed tariffs on Chinese products, Consumer Technology Association (CTA) Vice President of International Trade Sage Chandler argues tariffs negatively impact businesses and consumers as well as fail to corr... » read more

Advanced Packaging Confusion


Advanced packaging is exploding in all directions. There are more chipmakers utilizing different packaging options, more options for the packages themselves, and a confusing array of descriptions and names being used for all of these. Several years ago, there were basically two options on the table, 3D-ICs and 2.5D. But as chipmakers began understanding the difficulty, cost and reduced benef... » read more

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