All posts by: Edgetech

Sourcing alumina substrate or custom alumina ceramic parts can look simple from the purchasing side. There is a drawing, a quantity, a material name, and a target price. But if those are the only things under review, the project usually carries more risk than expected. Ceramic components are not difficult because the material is mysterious. […]

A molybdenum plate order is not finished when you choose the size. The surface condition can change how the plate machines, how clean it is in assembly, and whether you are paying for work you do not actually need. In practice, buyers usually end up choosing between three common conditions: as-rolled, ground, and chemically cleaned. […]

Tantalum is a rewarding material when the process is under control and an unforgiving one when it is not. That is true for both tantalum wire and tantalum rod production. The metal’s value means scrap is expensive, and its performance expectations mean defects usually show up in applications where failure is highly visible. Where Tantalum […]

Introduction: An IGBT or MOSFET package lives or dies as a stack of layers, and the ceramic substrate is the layer where insulation, mechanical support, and heat flow all have to agree. When an IGBT module or a MOSFET power package fails, the failure usually starts at an interface rather than in the silicon die. […]

What Recent Radiopaque Marker Recalls Teach Us About Marker Band Design and Inspection Recent public recall notices across the broader device market have a useful message for engineers: radiopaque features are still not “solved.” Missing markers, non-visible markers, and detached radiopaque components are not theoretical failure modes. They are exactly the kinds of issues that […]

Introduction: Thermal shock resistance, maximum working temperature, and CTE describe three different conditions, and reading them as one number leads to the wrong substrate choice. When engineers compare silicon nitride ceramic substrates for power modules, high-temperature sensors, or aerospace electronics, two figures often sit next to each other on the datasheet: a thermal shock rating […]

Introduction: Fracture toughness above 6.0 MPa·m^(1/2) changes the way a crack travels through silicon nitride, and that is why these ceramic substrates hold up better inside power modules. A cracked ceramic substrate rarely fails alone. When the insulating layer in a power module breaks, the copper above it can delaminate, solder joints can lose contact, […]

A surprising number of tungsten purchasing problems start with a surface finish that was never discussed clearly. The drawing calls out thickness and purity, the buyer assumes a standard finish, the supplier ships material that is technically correct, and the shop discovers too late that “technically correct” is not the same as “ready for this […]

Introduction: A silicon nitride ceramic substrate is a dense, gray-black ceramic plate that insulates, supports, and cools power semiconductors in high-voltage and high-temperature electronics. Anyone comparing a ceramic substrate with an ordinary circuit board runs into the same confusion: both are flat, both carry electrical circuits, and both sit underneath components. The difference only shows […]