Surface Mounted Oven Controlled Crystal Oscillator Design
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Solution Overview
Problem
Conventional surface mounted oven controlled crystal oscillators face issues with stability, manufacturing complexity, and high production costs due to faulty soldering and mechanical defects, which hinder efficient assembly and compact design.
Innovation Solution
A surface mounted oven controlled crystal oscillator design featuring functional pins drilling through a base plate to connect with pads, eliminating the need for a conversion printed circuit board, ensuring stable electrical connections and simplified manufacturing through surface mounted technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the functional pins are directly soldered to client products by inserting way, then the electric connection is established, but the height is bigger which goes against compact manufacturing and faulty soldering may appear
Solution Approach 1:
The patent transitions from through-hole insertion (vertical dimension) to surface mounting (horizontal dimension). The functional pins are bent at right angles and mounted on the surface of the base plate, changing the connection dimension from vertical insertion to horizontal surface mounting, thereby reducing overall height while maintaining connection reliability
Solution Approach 2:
Instead of inserting pins through the base plate from one side, the patent inverts the approach by bending the pins at right angles and mounting them on the surface. The connection approach is inverted from internal through-hole soldering to external surface mounting, solving both height and reliability issues
2Ease of manufacture
If the oven controlled crystal oscillator uses in-line package with direct insertion, then the assembly is simple, but manual operation is needed which increases cost and decreases production efficiency
Solution Approach 1:
The patent makes the oscillator compatible with both traditional through-hole mounting and modern surface-mount technology (SMT). The base plate design with surface-mounted functional pins allows the component to be assembled using automated SMT pick-and-place machines, providing universal compatibility with modern high-speed assembly equipment while maintaining ease of manufacture
3Ease of operation
If the functional pins are soldered to a conversion printed circuit board first, then the surface mounting is achieved, but the manufacturing process becomes complicated and cost increases
Solution Approach 1:
The patent extracts and eliminates the intermediate conversion printed circuit board from the assembly process. The functional pins are directly mounted on the base plate surface, removing the need for a separate conversion PCB and its associated soldering steps, thereby simplifying the manufacturing process while maintaining surface mounting capability
Solution Approach 2:
The patent merges the function of the conversion printed circuit board directly into the base plate structure. The base plate itself becomes the mounting surface for functional pins, combining what were previously separate components (base plate and conversion PCB) into a single integrated structure, reducing manufacturing complexity
4Productivity
If the oven controlled crystal oscillator is made with surface mounted way, then the production efficiency improves, but the weight causes oscillation that invalidates electric connection
Solution Approach 1:
The patent provides beforehand cushioning by designing enlarged pad structures on the base plate where functional pins are mounted. These enlarged pads act as mechanical anchors and stress distribution areas that prevent pin oscillation and connection invalidation, compensating for the weight-induced vibrations in surface-mounted configuration
Solution Approach 2:
The patent changes the geometric parameters of the mounting structure by creating enlarged pad areas on the base plate. This parameter change increases the mechanical strength and stability of the functional pin connections, preventing oscillation-induced connection failure while maintaining surface mounting for high productivity
Data Source
AI summary
A surface mounted oven controlled crystal oscillator includes a crystal oscillator shell, a crystal oscillation circuit, several functional pins and a base plate. The crystal oscillation circuit is accommodated in a cavity that is formed by the crystal oscillator shell and the base plated and electrically connects with the functional pins. The functional pins drill through the base plate from the cavity. An insulating layer is formed between each functional pin and the base plate. The surface mounted oven controlled crystal oscillator further includes several pads formed at an outer surface of the base plate. The insulating layer is also formed between each pad and the base plate, and the functional pins are electrically connected with the corresponding pads respectively. Added pads, the oven controlled crystal oscillator has high stability, simple manufacturing process, and low manufacturing cost. Moreover, the oven controlled crystal oscillator is mounted on the product by using surface mounted technology, thereby achieving mechanized batch production with high efficiency.