An Interview with Adam McCombs

The Amp Hour · 25 Feb 2019 · 1h 16m · Episode 431

What this episode covers

Adam McCombs, who runs a business repairing and relocating electron microscopes, explains the complex physics and engineering behind scanning (SEM), transmission (TEM), and scanning tunneling (STM) microscopes. He details the challenges of achieving ultra-high vacuum using turbo and diffusion pumps, the high-voltage electronics required to generate and focus electron beams, and the sample preparation techniques like gold sputter coating. McCombs also discusses the physical dangers of moving these top-heavy, high-voltage instruments and the specific failure modes encountered during troubleshooting.

Mentioned

Companies
FEI, Thermo Fisher, Allen Institute of Brain Research, NWNCLabs
Products
ISI Super 3A, Joel 35 C, Joel 1200 EX Mark one, Phillips EM 400 T, Phillips EM 410 TEM
Also
Ben Kravsno, Dan Berard, Vacuum Hackers

Other shows on the same ground, closest first.

  • Embedded.fm · 1h 03m

    419: Fission Chips

    Eric Schlaepfer and Windell Oskay, authors of the book Open Circuits, discuss the process of cross-sectioning electronic components to reveal their internal structures. They detail the technical challenges of preparing samples, including resin impregnation, vacuum degassing, and hand-sanding with grits up to 10,000, as well as the macro photography techniques involving focus stacking and custom robotic rigs. The conversation covers specific components like the μA702 integrated circuit, tantalum capacitors, and cathode-ray tubes, highlighting the blend of engineering failure analysis and artistic photography.

  • Being an Engineer · 46m

    S4E28 Kevin Distelhurst | Semiconductors – What They Are & How They’re Manufactured

    Kevin Distelhurst, a failure analysis engineer with a career in semiconductor manufacturing, explains the physics and fabrication of chips, detailing the transition from silicon devices to copper interconnects and the role of photolithography. He discusses the extreme precision required in cleanrooms, the use of scanning and transmission electron microscopes (SEM/TEM) for defect analysis, and the industry's shift towards integrating diverse components like wireless chips onto single packages as Moore's Law slows. Distelhurst also shares insights on the collaborative nature of chip design, the significant slowdowns caused by tool downtime and human error, and the challenges of training new engineers who must develop 'wisdom' through practice.

  • Hackaday Podcast · 1h 02m

    Ep 291: Walking in Space, Lead in the Earth, and Atoms under the DIY MIcroscope

    Hosts Elliot Williams and Al Williams review the week's top hacks, including a DIY scanning tunneling microscope built by Mech Panda that images atoms, and a deep dive into power optimization for the Raspberry Pi Zero by Manaworm. They also discuss a 32-IMU sensor array by Will Wong designed for high-precision dead reckoning, and a hardware hack by Treble that enables NVMe SSDs in a ThinkPad 13. The episode concludes with long-form articles on the history and dangers of spacewalks (EVA) and the industrial mining of lead.

The summary, chapters and topics are generated from the episode’s audio by this directory, not written by The Amp Hour. The episode itself belongs to its publisher.