Spring retainer for encapsulated semiconductor device
First Claim
1. An easily installed, pressure distributing retainer for clamping a device having an aperture therein to a plate-like member having an aperture therein, said retainer comprising:
- a body of flat spring stock bent approximately centrally along a transverse fold line to define integral first and second noncoplanar portions having an acute angle therebetween;
first and second bayonet arms formed out of said first noncoplanar portion and extending substantially coplanarly within the acute angle between said noncoplanar portions;
each of said bayonet arms terminating in a transversely operative barb portion;
said bayonet arms being mutually transversely compliant to permit said bayonet arms to be flexed transversely as they are urged through an aperture;
at least one clamping arm formed out of said first noncoplanar portion,said clamping arm being shorter than said bayonet arms and having an end adapted for applying a clamping force towards a surface,effective to allow said second noncoplanar portion to also apply a clamping force towards said surface.
1 Assignment
0 Petitions
Accused Products
Abstract
A spring steel bayonet type retainer for securing encapsulated semiconductor devices to circuit boards either directly or through an intermediate heat dissipator. The retainer comprises a spring steel body bent approximately centrally and at approximately right angles. At least one portion is slotted to define outboard spring fingers and inboard bayonet type arms which extend through aligned holes in the device and the circuit board. The noncoplanar portions provide clamping forces on the main body of the encapsulated semiconductor device and may be provided with laterally outwardly extending ears to fit closely within the confines of a heat dissipator device to prevent relative rotation therebetween.
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Citations
9 Claims
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1. An easily installed, pressure distributing retainer for clamping a device having an aperture therein to a plate-like member having an aperture therein, said retainer comprising:
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a body of flat spring stock bent approximately centrally along a transverse fold line to define integral first and second noncoplanar portions having an acute angle therebetween; first and second bayonet arms formed out of said first noncoplanar portion and extending substantially coplanarly within the acute angle between said noncoplanar portions; each of said bayonet arms terminating in a transversely operative barb portion; said bayonet arms being mutually transversely compliant to permit said bayonet arms to be flexed transversely as they are urged through an aperture; at least one clamping arm formed out of said first noncoplanar portion, said clamping arm being shorter than said bayonet arms and having an end adapted for applying a clamping force towards a surface, effective to allow said second noncoplanar portion to also apply a clamping force towards said surface. - View Dependent Claims (2, 3)
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4. An easily installed retainer for securing an encapsulated semiconductor device to a circuit board comprising:
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an integral body of flat spring metal stock having opposite ends and transversely bent at an acute angle to form securement and clamp portions joined at a fold line; the securement portion comprising outboard spring fingers and inboard bayonet arms, said fingers and arms being mutually defined by parallel longitudinal slots extending from the securement portion end of said body substantially to said fold line, said bayonet arms having outwardly extending barbed end portions; said arms of said securement portion of said body forming an acute angle with said clamp portion that is not greater than the acute angle the balance of said securement portion makes with said clamp portion; said bayonet arms having a longitudinal length greater than said spring fingers to extend through registered apertures in said device and in said board and, by way of said barbed end portions, resist removal from said board, the length of said bayonet arms in comparison to the length of the fingers being such as to cause the securement and clamp portions, while bearing against top surfaces of said device, to flex resiliently toward the unfolded condition to hold said device to said circuit board. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification