Leading cardiovascular company leverages vertically integrated capabilities for intricate implantable component


A world-leading cardiovascular and endovascular medical technology company needed a specially designed micro seal for an implantable cardioverter defibrillator. The micro component would be used inside the device to isolate electrical contacts and prevent fluid ingress into the electrical path.

The micro part needed to precisely meet tight dimensional tolerance specifications, and required a two-step molding process. The inside core of the part needed to be injection molded using PEEK, then over-molded with silicone. Because silicone is a rubbery, not solid material, it added complexity to the development and design for manufacturability of the component. For the initial project, the company preferred to use a single-cavity approach, as this provided less variability than multi-cavity.

The global company sought the advantage of working with a contract manufacturing partner from end to end. They chose to rely on Donatelle’s in-house vertically integrated capabilities with robust quality systems and long history of consistently transforming high-temp, medical-grade plastics, metals and other exotic materials into implantable devices and components.


In the first phase of the engagement, Donatelle’s team designed and built intricate prototype molding tools needed to micromold the PEEK and silicone components. From there, the team worked closely with the global company’s product development team, taking several concepts through iterative rounds of prototyping and testing of various seal geometries. With diligence and precision, the exact specifications and requirements were met. Then, the team leveraged the knowledge gained through prototyping, and transitioned to a single-cavity production tooling approach, moving the program through process validation and into production for the product launch.

Within a few years, the demand for the cardiovascular company’s defibrillator device increased year over year, until finally demand was outpacing production. The company needed help maximizing production of the micro seal to keep pace with demand. Donatelle successfully designed, developed and qualified additional tooling and manufacturing processes, using a multi-cavity, tight tolerance, micromolded PEEK inner core first shot, and a multi-cavity micromolded liquid silicone rubber outer seal for the second shot. The solution increased production and helped reduce overall manufacturing costs.


Donatelle provided an end-to-end solution, leveraging vertically integrated capabilities that seamlessly enabled the development, testing and validation processes for the component.

The cardiovascular company continues to rely on Donatelle to consistently and reliably manufacture the micro seal for this device, and has awarded similar product programs to the contract manufacturer’s roster.

Our suite of integrated contract manufacturing services, enhanced by our SmartStack® and NeuroStack® technologies, provides a competitive advantage with customizable linear contact systems. Plus, our facility features controlled environments, ISO 7 (class 10,000) cleanrooms and cleanroom production cells with integrated vision systems capable of operating at ISO 5 (class 100) level. *Moldflow® is a registered trademark of Autodesk® Inc.

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